Coupling Identification
- German DIN (Deutsche Industrial Norme)
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There are five coupling systems generally used for hydraulic
connections today. They are identified geographically or by
country as:
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German Thread Types
Popular couplings are German DIN (Deutsche Industrial Norme).
A coupling referred to as metric, usually means a DIN coupling.
Flanges are standard Code 61 or Code 62 (except -10)*.
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DIN 24° Cone
DIN 60° Cone
DIN 3852 Couplings
DIN 3852 Type C
Metric Standpipe Assembly |
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DIN 24° Cone
The DIN 24° cone male will mate with any of the three
females shown.
The male has a 24° seat, straight metric threads, and
a recessed counterbore which matches the tube O.D. of the
coupling used with it. The mating female is a 24° cone
with O-ring, a metric tube fitting or a universal 24°
or 60° cone.
There is a light and heavy series DIN coupling. Proper identification
is made by measuring both the thread size and the tube O.D.
(The heavy series has a smaller tube O.D. than the light,
but has a thicker wall section.)
When measuring the flare angle with the seat angle gauge,
use the 12° gauge. (The seat angle gauge measures the
angle from the connector centerline.)
DIN 24° male and Mating Females
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Metric
Thread
Size
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Male
Thread
O.D.
(mm)
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Female
Thread
I.D. (mm)
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Tube O.D.
Light
Series
(mm)
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Tube O.D.
Heavy
Series
(mm)
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M12x1.5
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12.0
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10.5
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6
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-
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M14x1.5
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14.0
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12.5
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8
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-
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M16x1.5
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16.0
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14.5
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10
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8
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M18x1.5
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18.0
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16.5
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12
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10
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M20x1.5
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20.0
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18.5
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14
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12
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M22x1.5
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22.0
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20.5
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15
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14
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M24x1.5
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24.0
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22.5
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-
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16
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M26x1.5
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26.0
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24.5
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18
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-
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M30x2.0
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30.0
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28.0
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22
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20
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M36x2.0
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36.0
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34.0
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28
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25
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M42x2.0
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42.0
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40.0
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-
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30
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M45x2.0
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45.0
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43.0
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35
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-
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M52x2.0
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52.0
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50.0
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42
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38
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top of page
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DIN 60° Cone
The DIN 60° cone male will mate with the female universal
24° or 60° cone connector only.
The male has a 60° seat and straight metric threads.
The female has a 24° and 60° universal seat and straight
metric threads.
When measuring the flare angle with the seat angle gauge,
use the 30° gauge. (The seat angle gauge measures the
angle from the connector centerline.)
DIN 60° Male and Mating Female
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Metric
Thread
Size
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Male
Thread
O.D. (mm)
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Female
Thread
I.D. (mm)
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Tube
O.D.
(mm)
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M12x1.5
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12.0
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10.5
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6
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M14x1.5
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14.0
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12.5
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8
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M16x1.5
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16.0
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14.5
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10
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M18x1.5
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18.0
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16.5
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12
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M20x1.5
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20.0
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18.5
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14
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M22x1.5
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22.0
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20.5
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15
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M24x1.5
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24.0
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22.5
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-
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M26x1.5
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26.0
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24.5
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18
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M30x2.0
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30.0
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28.0
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22
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top of page
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DIN 3852 Couplings Type A &
B
(Parallel Threads)
The male DIN 3852 Type A & B couplings will mate with
the female DIN coupling shown below.
The male and female type A & B couplings have straight
threads. Sheet 1 refers to straight metric threads, and sheet
2 refers to straight Whitworth threads. The seal occurs when
the ring seal (Type A) or the face seal (Type B) mates with
the face of the female port.
These are two series of DIN 3852 Type A & B couplings,
the light (L) and the heavy (S) series.
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Series
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Male
Metric Thread
Parallel
DIN 3852 Type A & B
Sheet 1
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Male
Whitworth Thread
Parallel
DIN 3852 Type A & B
Sheet 2
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Tube
O.D.
(mm)
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Metric
Thread
Size
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Thread
O.D.
(mm)
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A
(mm)
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B
(mm)
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C
(mm)
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Whitworth
Thread
Size
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Thread
O.D.
(in)
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A
(mm)
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B
(mm)
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C
(mm)
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L
Light
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6
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10x1
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10
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14
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1.5
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8
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1/8-28
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3/8
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14
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1.5
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8
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8
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12x1.5
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12
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17
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2.0
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12
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1/4-19
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1/2
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17
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2.0
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12
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10
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14x1.5
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14
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19
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2.0
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12
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1/4-19
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1/2
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19
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2.0
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12
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12
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16x1.5
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16
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21
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2.5
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12
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3/8-19
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21/32
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21
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2.5
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12
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15
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18x1.5
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18
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23
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2.5
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12
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1/2-14
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13/16
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23
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2.5
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12
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18
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22x1.5
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22
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27
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3.0
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14
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1/2-14
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13/16
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27
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3.0
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14
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22
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26x1.5
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26
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31
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3.0
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16
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3/4-14
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11/32
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31
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3.0
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16
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28
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33x2
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33
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39
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3.0
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18
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1-11
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15/16
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39
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3.0
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18
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35
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42x2
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42
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49
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3.0
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20
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11/4-11
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121/32
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49
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3.0
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20
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42
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48x2
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48
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55
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3.0
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22
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11/2-11
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17/8
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55
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3.0
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22
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S
Heavy
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6
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12x1.5
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12
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17
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2.0
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12
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1/4-19
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1/2
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17
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2.0
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12
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8
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14x1.5
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14
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19
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2.0
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12
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1/4-19
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1/2
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19
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2.0
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12
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10
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16x1.5
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16
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21
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2.5
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12
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3/8-19
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21/32
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21
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2.5
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12
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12
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18x1.5
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18
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23
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2.5
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12
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3/8-19
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21/32
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23
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2.5
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12
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14
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20x1.5
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20
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25
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3.0
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14
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1/2-14
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13/16
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25
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3.0
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14
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16
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22x1.5
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22
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27
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3.0
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14
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1/2-14
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13/16
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27
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3.0
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14
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20
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27x2
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27
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32
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3.0
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16
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3/4-14
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11/32
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32
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3.0
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16
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25
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33x2
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33
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39
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3.0
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18
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1-11
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15/16
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39
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3.0
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18
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30
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42x2
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42
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49
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3.0
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20
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11/4-11
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121/32
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49
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3.0
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20
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38
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48x2
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48
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55
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3.0
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22
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11/2-11
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17/8
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55
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3.0
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22
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Female
Metric Thread
Parallel
DIN 3852 Type A & B
Sheet 1
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Female
Metric Thread
Parallel
DIN 3852 Type A & B
Sheet 2
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Metric
Thread
Size
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Thread
O.D.
(mm)
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A
(mm)
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B
(mm)
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Whitworth
Thread
Size
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Thread
O.D.
(in)
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A
(mm)
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B
(mm)
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10x1
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8.5
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15
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1.0
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1/8-28
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11/32
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15
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1.0
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12x1.5
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10.5
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18
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1.5
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1/4-19
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15/32
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19
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1.5
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14x1.5
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12.5
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20
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1.5
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1/4-19
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15/32
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19
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1.5
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16x1.5
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14.5
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22
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1.5
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3/8-19
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19/32
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23
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2.0
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18x1.5
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16.5
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24
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2.0
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1/2-14
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3/4
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27
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2.5
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22x1.5
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20.5
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28
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2.5
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1/2-14
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3/4
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27
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2.5
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26x1.5
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24.5
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32
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2.5
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3/4-14
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31/32
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33
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2.5
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33x2
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31.5
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40
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2.5
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1-11
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17/32
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40
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2.5
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42x2
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40.5
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50
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2.5
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11/4-11
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117/32
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50
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2.5
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48x2
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46.5
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56
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2.5
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11/2-11
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125/32
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56
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2.5
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12x1.5
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10.5
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18
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1.5
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1/4-19
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15/32
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19
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1.5
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14x1.5
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12.5
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20
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1.5
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1/4-19
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15/32
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19
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1.5
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16x1.5
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14.5
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22
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1.5
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3/8-19
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19/32
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23
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2.0
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18x1.5
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16.5
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24
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2.0
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3/8-19
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19/32
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23
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2.0
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20x1.5
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18.5
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26
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2.0
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1/2-14
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3/4
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27
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2.5
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22x1.5
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20.5
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28
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2.5
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1/2-14
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3/4
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27
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2.5
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27x2
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25.5
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33
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2.5
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3/4-14
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31/32
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33
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2.5
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33x2
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31.5
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40
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2.5
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1-11
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17/32
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40
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2.5
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42x2
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40.5
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50
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2.5
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11/4-11
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117/32
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50
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2.5
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48x2
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46.5
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56
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2.5
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11/2-11
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125/32
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56
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2.5
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top of page
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DIN 3852 Type C Sheets 1 &
2 Metric and Whitworth Tapered Thread Connectors
The DIN 3852 Type C couplings are available with either metric
or Whitworth British thread. The male will mate only with
the female as shown.
The male and female couplings have tapered threads. Sheet
1 refers to tapered metric threads, and Sheet 2 refers to
tapered Whitworth threads. The seal takes place on the threads.
There are three series of DIN 3852 Type C couplings: extra
light (LL), light (L) and heavy (S).
DIN 3852 Type C Sheets 1 & 2 Metric
and Whitworth Tapered Thread Connectors
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Series
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Male DIN 3852
Type C, Sheet 1
Metric Tapered Threads
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Male DIN 3852
Type C, Sheet 2
Whitworth Tapered Threads
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Tube
O.D.
(mm)
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Metric
Thread
Size
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A
(mm)
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B
(mm)
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Thread
O.D.
(mm)
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Whitworth
Thread
Size
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A
(in)
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B
(mm)
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Thread
O.D.
(in)
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LL
Extra
Light
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4
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8x1
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8.40
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8
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8
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1/8-28
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.392
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8
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1/8
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5
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8x1
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8.40
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8
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8
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1/8-28
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.392
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8
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1/8
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6
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10x1
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10.40
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8
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10
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1/8-28
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.392
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8
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1/8
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8
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10x1
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10.40
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8
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10
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1/8-28
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.392
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8
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1/8
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L
Light
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6
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10x1
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10.40
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8
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10
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1/8-28
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.392
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8
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1/8
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8
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12x1.5
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12.53
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12
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12
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1/4-19
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.532
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12
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1/4
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10
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14x1.5
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14.53
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12
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14
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1/4-19
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.532
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12
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1/4
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12
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16x1.5
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16.53
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12
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16
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3/8-19
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.670
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12
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3/8
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15
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18x1.5
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18.53
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12
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18
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1/2-14
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.839
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14
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1/2
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18
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22x1.5
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22.65
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14
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22
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1/2-14
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.839
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14
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1/2
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S
Heavy
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6
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12x1.5
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12.53
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12
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12
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1/4-19
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.532
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12
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1/4
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8
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14x1.5
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14.53
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12
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14
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1/4-19
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.532
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12
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1/4
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10
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16x1.5
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16.53
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12
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16
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3/8-19
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.670
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12
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3/8
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12
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18x1.5
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18.53
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12
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18
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3/8-19
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.670
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12
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3/8
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14
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20x1.5
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20.65
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14
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20
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1/2-14
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.839
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14
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1/2
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16
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22x1.5
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22.65
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14
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22
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1/2-14
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.839
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14
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1/2
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Female DIN 3852
Type C, Sheet 1
Metric Tapered Threads
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Female DIN 3852
Type C, Sheet 2
Whitworth Tapered Threads
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Metric
Thread
Size
|
Thread
I.D.
(mm)
|
A
(mm)
|
Whitworth
Thread
Size
|
Thread
I.D.
(in)
|
A
(mm)
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8x1
|
6.5
|
5.5
|
1/8-28
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11/32
|
5.5
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8x1
|
6.5
|
5.5
|
1/8-28
|
11/32
|
5.5
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10x1
|
8.5
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5.5
|
1/8-28
|
11/32
|
5.5
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10x1
|
8.5
|
5.5
|
1/8-28
|
11/32
|
5.5
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10x1
|
8.5
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5.5
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1/8-28
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11/32
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5.5
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12x1.5
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10.5
|
8.5
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1/4-19
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15/32
|
8.5
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14x1.5
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12.5
|
8.5
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1/4-19
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15/32
|
8.5
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16x1.5
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14.5
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8.5
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3/8-19
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19/32
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