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DIN 7643:2005 Bolt

DIN 7643:2005 Bolt is characterized by an annular hollow bolt structure and is intended for bolt applications requiring wire passage, fluid routing, weight reduction, or a special connection path.

The hollow passage can reserve space for cables, oil, air, or gas, while the ring-shaped design supports stopping, connection, or guiding in specific mechanisms. In assembly, the design helps reduce supporting operations, improve positioning consistency, and maintain good interchangeability in repeated production or field service.

Typical applications include hydraulic and pneumatic accessories, special equipment, vehicle systems, fixtures, and custom mechanical structures. The product can be configured with bore size, length, material, and sealing surface finish to suit indoor, outdoor, light-load, vibration-exposed, or export supply conditions.

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PREV：DIN 564:1995 Small Hex Head Cone Point Set Screw NEXT：DIN 22424:1990 Triangular Screw

Dimensions unit: inch 

 Pipe outer diameter 

4 and 5

6

8

10

12

15

18

22

28

35

42

d

M8*1

M10*1

M12*1.5

M14*1.5

M16*1.5

M18*1.5

M22*1.5

M26*1.5

M30*1.5

M38*1.5

M45*1.5

b1

Min.

8.5

8.5

11

11

11

11

13

13

13

15

15

L1

Deviation value

±0.2

17

19

24

26

28

32

39

45

51

61

69

t1

Deviation value

±0.2

15

17

22

24

26

29

35.5

41

46

56

64

b2

Min.

-

12.5

15

17

19

21

24

28

30

-

-

L2

Deviation value

±0.2

-

23

28

32

36

42

50

60

68

-

-

t2

Deviation value

±0.2

-

21

26

30

34

39

46.5

56

63

-

-

d1

Max.

-

3.05

3.8

4.8

5.8

7.36

9.36

11.43

13.43

16.43

20.52

Min.

-

2.8

3.5

4.5

5.5

7

9

11

13

16

20

d2

Max.

3.25

3.8

4.8

5.8

7.36

8.86

11.43

13.93

16.43

20.52

24.52

Min.

3

3.5

4.5

5.5

7

8.5

11

13.5

16

20

24

ds

Max.

8

10

12

14

16

18

22

26

30

38

45

Min.

7.85

9.85

11.82

13.82

15.82

17.82

21.79

25.79

29.79

37.75

44.75

d3

Max.

4.3

5.8

7.36

9.36

11.43

13.43

16.43

20.52

24.52

32.62

39.62

Min.

4

5.5

7

9

11

13

16

20

24

32

39

m

5

6

6

6

6

6

7

7

7

8

9

P1

Deviation value

±0.2

-

4.5

5

5.5

6.5

7.5

9

10.5

12.5

14

16

P2

Deviation value

±0.2

-

6.5

8

9.5

11.5

14

18

22.5

27.5

33

39

P3

Deviation value

±0.2

4.5

6

7

8

9

12

15

17

20

24

28

r

0.2

0.2

0.2

0.2

0.2

0.2

0.4

0.4

0.4

0.6

0.6

s

12

14

17

19

22

24

27

32

36

46

55

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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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NEWS

Latest News

  • What is a Screw?

    A screw is a fastening tool that utilizes the principle of an inclined spiral plane to join or secure objects together. Its core structure consists of a cylindrical body with continuous threads (like spiral ridges), typically featuring a head at one end for convenient rotation. When turned, the rotational motion is con...

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  • What is a Nuts?

    Now that we've covered bolts, their "perfect partner" — the nut — is much easier to understand. Simply put, a nut is a small metal block or disc with a round hole in the center and internal threads on the wall of that hole. Its core function is to work with an externally threaded bolt to clamp two or more components to...

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  • What is a Washers?

    Simply put, a washer is a thin, disc-shaped ring with a central hole, typically made of metal (such as carbon steel, stainless steel, or copper) or non-metallic materials (such as rubber, plastic, or asbestos). It is placed between the head of a bolt/nut and the surface of the workpiece, or at the junction between the ...

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  • What is a Bolt?

    Simply put, a bolt is a cylindrical fastener with external threads. It works with a matching nut or is screwed directly into a threaded hole of the mating part to firmly hold two or more components together. To put it intuitively, think of it as a "metal nail." However, unlike a nail that is driven in with a hammer, a ...

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