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DIN 908:2020 Internal Socket Sealing Plug

DIN 908:2020 Internal Socket Sealing Plug features an internal socket drive with a washer-style sealing arrangement, making it suitable for plugging positions that require removable maintenance and dependable sealing.

The washer or sealing ring improves face sealing, and the recessed socket can be operated with suitable internal-drive tools while minimizing external protrusion. This structure supports efficient assembly while balancing joint stability, load distribution, and convenient maintenance, making it practical for standardized purchasing and volume production.

This product can be used in oil passage plugs, equipment housings, hydraulic manifolds, inspection holes, and machinery pipe interfaces. Gasket material, thread size, and media-resistant material can be selected to meet requirements for corrosion protection, wear resistance, assembly efficiency, and long-term reliability.

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Dimensions unit: inch 

Nominal Dimension

M10

M12

G1/4A

M14

M16

G3/8A

M18

M20

G1/2A

M22

M24

M26

M27

d

G1/8A

G3/4A

d

Pipe thread

G1/8A

-

G1/4A

-

-

G3/8A

-

-

G1/2A

-

-

-

G3/4A

P

Pitch

1

1

1.5

-

1.5

1.5

-

1.5

1.5

-

1.5

1.5

1.5

2

2

-

-

-

-

-

-

-

-

-

-

-

-

-

k

Min.=Nominal

3

3

3

3

3

3

4

4

4

4

4

4

4

Max.

3.5

3.5

3.5

3.5

3.5

3.5

4.5

4.5

4.5

4.5

4.5

4.5

4.5

dk

Max.=Nominal (h14)

14

17

18

19

21

22

23

25

26

27

29

31

32

Min.

13.57

16.57

17.57

18.48

20.48

21.48

22.48

24.48

25.48

26.48

28.48

30.38

31.38

i

± 0.2

8

12

12

12

12

12

12

14

14

14

14

16

16

L

≈

11

15

15

15

15

15

16

18

18

18

18

20

20

e

Min.

5.723

6.863

6.863

6.863

9.149

9.149

9.149

11.429

11.429

11.429

13.716

13.716

13.716

s

Nominal

5

6

6

6

8

8

8

10

10

10

12

12

12

Max.

5.14

6.14

6.14

6.14

8.175

8.175

8.175

10.175

10.175

10.175

12.212

12.212

12.212

Min.

5.02

6.02

6.02

6.02

8.025

8.025

8.025

10.025

10.025

10.025

12.032

12.032

12.032

t1

Min.

5

7

7

7

7.5

7.5

7.5

7.5

7.5

7.5

7.5

9

9

Slot number

Reference DIN EN ISO 10664

30

40

40

45

50

50

50

55

55

55

60

60

60

A

Reference DIN EN ISO 10664

5.6

6.75

6.75

7.93

8.95

8.95

8.95

11.35

11.35

11.35

13.45

13.45

13.45

B

Reference DIN EN ISO 10664

4.05

4.85

4.85

5.64

6.45

6.45

6.45

8.05

8.05

8.05

9.6

9.6

9.6

t2

Min.

2.5

2.7

2.7

2.9

3.7

3.7

3.7

4.6

4.6

5.4

6.4

6.4

6.4

Slot number

Reference DIN 34824

N6

N8

N8

N8

N10

N10

N10

N12

N12

N14

N16

N16

N16

c

Reference DIN 34824

Max.

6.16

7.4

7.4

7.4

9.84

9.84

9.84

11.7

11.7

13.54

15.99

15.99

15.99

Min.

6.06

7.28

7.28

7.28

9.69

9.69

9.69

11.51

11.51

13.32

15.73

15.73

15.73

t3

Min.

2.5

2.9

2.9

2.9

3.7

3.7

3.7

4.6

4.6

5.4

6.4

6.4

6.4

w

Min.

3

3

3

3

3

3

3

4

4

4

4

4

4

Weight per thousand pieces kg

≈

6.3

11.3

14.6

16

19

21.4

28.3

37.5

40.8

47.5

53.5

68.7

73.5

  

Nominal Dimension

M30

M33

M36

M38

M39

M42

M45

M48

M52

G1-3/4A

M56

M60

M64

d

G1A

G1-1/8A

G1-1/4A

G1-1/2A

G2A

d

Pipe thread

-

G1A

-

G1-1/8A

-

G1-1/4A

-

G1-1/2A

-

G1-3/4A

-

G2A

-

P

Pitch

1

1.5

-

1.5

1.5

-

1.5

1.5

1.5

1.5

-

-

-

-

2

2

2

2

-

2

2

2

2

2

-

2

2

2

k

Min.=Nominal

4

5

5

5

5

5

5

5

5

5

5

5

5

Max.

4.5

5.5

5.5

5.5

5.5

5.5

5.5

5.5

5.5

5.5

5.5

5.5

5.5

dk

Max.=Nominal (h14)

36

39

42

44

46

49

52

55

60

62

64

68

72

Min.

35.38

38.38

41.38

43.38

45.38

48.38

51.26

54.26

59.26

61.26

63.26

67.26

71.26

i

± 0.2

16

16

16

16

16

16

16

16

16

20

20

20

20

L

≈

20

21

21

21

21

21

21

21

21

25

25

25

25

e

Min.

19.437

19.437

21.734

21.734

21.734

25.154

25.154

27.434

27.434

36.571

36.571

36.571

36.571

s

Nominal

17

17

19

19

19

22

22

24

24

32

32

32

32

Max.

17.23

17.23

19.275

19.275

19.275

22.275

22.275

24.275

24.275

32.33

32.33

32.33

32.33

Min.

17.05

17.05

19.065

19.065

19.065

22.065

22.065

24.065

24.065

32.08

32.08

32.08

32.08

t1

Min.

9

9

10.5

10.5

10.5

10.5

10.5

10.5

10.5

14

14

14

14

Slot number

Reference DIN EN ISO 10664

80

80

-

-

-

-

-

-

-

-

-

-

-

A

Reference DIN EN ISO 10664

17.75

17.75

-

-

-

-

-

-

-

-

-

-

-

B

Reference DIN EN ISO 10664

12.8

12.8

-

-

-

-

-

-

-

-

-

-

-

t2

Min.

7.3

7.3

-

-

-

-

-

-

-

-

-

-

-

Slot number

Reference DIN 34824

N18

N18

-

-

-

-

-

-

-

-

-

-

-

c

Reference DIN 34824

Max.

17.18

17.18

-

-

-

-

-

-

-

-

-

-

-

Min.

16.94

16.94

-

-

-

-

-

-

-

-

-

-

-

t3

Min.

7.3

7.3

-

-

-

-

-

-

-

-

-

-

-

w

Min.

4

4

4

4

4

4

4

4

4

4

4

4

4

Weight per thousand pieces kg

≈

84

111

134

149

163

187

215

246

302

320

386

445

530

 

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Better Fastener is a professional fastener enterprise specializing in the manufacturing of steel washers, stainless steel washers, spring washers and sealingwashers. Founded in 2001 as a washer factory, the company expanded into a comprehensive enterprise integrating washers, nuts, bolts, spring nuts and other fastener products in 2010.

The company positions itself as a provider of comprehensive one-stop services for customers, relying on technological R&D, industrial investment and trade distribution.

With an experienced professional team and a sound sales network, Better Fastener has achieved excellent sales performance in both domestic and foreign markets,and has grown into one of the competitive manufacturers and suppliers in China's industrial fastener industry.

Better Fastener is committed to becoming a trusted fastener supplier for customers with reliable product quality, reasonable prices and on-time delivery

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