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DIN 22424:1990 Triangular Screw

DIN 22424:1990 Triangular Screw combines a triangular head with an integrated washer-style bearing face and is suitable for engineering connections requiring tamper resistance, a larger bearing surface, or a special drive head.

The triangular head limits removal with ordinary tools, while the washer face enlarges the clamping area and improves load distribution. Compared with ordinary fasteners, this form places more emphasis on controllable installation, surface protection, and efficient management of matching parts for engineering projects requiring stable supply.

It is commonly used in public facilities, equipment panels, rail transit accessories, cabinet structures, and dedicated fixtures. According to drawings or service conditions, head size, washer-face diameter, and protective finish can be selected to improve overall fastening performance and service life.

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PREV：DIN 7643:2005 Bolt NEXT：DIN 15237:1980 Screw

Dimensions unit: inch 

Thread size d

M4

M5

M6

M8

M10

M12

M16

M20

M24

P

Pitch

0.7

0.8

1

1.25

1.5

1.75

2

2.5

3

b2

Min.

5

6

8

10

12

14

17

21

25

Max.

5.5

6.5

8.8

10.8

12.1

14.1

18.5

22.5

26.5

c

Min.

1.9

1.9

1.9

2.2

2.7

2.9

3.4

3.9

4.7

Max.

2.1

2.1

2.1

2.4

2.9

3.1

3.6

4.1

5.1

dc

Min.

8.3

9.8

11.8

14.8

17.8

21.8

27.8

34.7

41.7

Max.

8.7

10.2

12.2

15.2

18.2

22.2

28.2

35.3

42.3

ds

Min.

2.8

3.7

4.4

6

7.5

9

12.5

16

19

Max.

3

3.9

4.6

6.2

7.7

9.2

12.7

16.2

19.2

s

Min.

6.3

7.8

9.55

11.55

14.3

15.8

19.8

24.8

29.8

Max.

6.5

8

9.75

11.75

14.5

16

20

25

30

k1

Min.

1

1.3

1.5

1.9

2.4

2.7

3.4

3.9

5.4

Max.

1.2

1.5

1.7

2.1

2.6

2.9

3.6

4.1

5.6

k

Min.

2.9

3.9

4.4

5.9

7.3

8.8

11.3

13.8

16.8

Max.

3.1

4.1

4.6

6.1

7.7

9.2

11.7

14.2

17.2

Weight per thousand pieces kg (Type A) 

-

-

-

-

-

-

-

-

-

Weight per thousand pieces kg (Type B) 

-

-

-

-

-

-

-

-

-

b1Min.

-

-

-

-

-

-

-

-

-

b1Max.

-

-

-

-

-

-

-

-

-

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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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NEWS

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