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DIN 128 (A):1994 Curved Spring Washer

DIN 128 (A):1994 Curved Spring Washer is used as an elastic loosening-resistant element in general threaded connections. After tightening, the curved profile generates axial rebound force that helps maintain contact pressure when slight relaxation occurs in the joint.

It is suitable for machinery, electrical enclosures, light brackets, maintenance assemblies, and low-to-medium load connections. With a simple structure and convenient installation, it can serve as an elastic compensation component for ordinary bolt or screw joints.

Carbon steel, stainless steel, and different surface treatments can be selected according to service environment, meeting rust resistance, conductivity, or appearance requirements while improving maintenance stability of the connection point.

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Dimensions unit: mm

Nominal diameter

2

2.5

3

3.5

4

5

6

7

8

10

d

Min.

2.1

2.6

3.1

3.6

4.1

5.1

6.1

7.1

8.1

10.2

Max.

2.4

2.9

3.4

3.9

4.4

5.4

6.5

7.5

8.5

10.7

dc

Max.

4.4

5.1

6.2

6.7

7.6

9.2

11.8

12.8

14.8

18.1

b

Nominal

0.9

1

1.3

1.3

1.5

1.8

2.5

2.5

3

3.5

Max.

1

1.1

1.4

1.4

1.6

1.9

2.65

2.65

3.15

3.7

Min.

0.8

0.9

1.2

1.2

1.4

1.7

2.35

2.35

2.85

3.3

s

Nominal

0.5

0.6

0.7

0.7

0.8

1

1.3

1.3

1.6

1.8

Max.

0.6

0.7

0.8

0.8

0.9

1.1

1.4

1.4

1.7

1.9

Min.

0.4

0.5

0.6

0.6

0.7

0.9

1.2

1.2

1.5

1.7

h

Min.

0.7

0.9

1.1

1.1

1.2

1.5

2

2

2.45

2.85

Max.

0.9

1.1

1.3

1.3

1.4

1.7

2.2

2.2

2.75

3.15

Weight per thousand pieces (steel)≈kg

0.035

0.055

0.09

0.1

0.15

0.3

0.7

0.75

1.3

2.1

   

Nominal diameter

12

14

16

18

20

22

24

27

30

36

d

Min.

12.2

14.2

16.2

18.2

20.2

22.5

24.5

27.5

30.5

36.5

Max.

12.7

14.7

17

19

21.2

23.5

25.5

28.5

31.7

37.7

dc

Max.

21.1

24.1

27.4

29.4

33.6

35.9

40

43

48.2

58.2

b

Nominal

4

4.5

5

5

6

6

7

7

8

10

Max.

4.2

4.7

5.2

5.2

6.2

6.2

7.25

7.25

8.25

10.25

Min.

3.8

4.3

4.8

4.8

5.8

5.8

6.75

6.75

7.75

9.75

s

Nominal

2.1

2.4

2.8

2.8

3.2

3.2

4

4

6

6

Max.

2.25

2.55

2.95

2.95

3.4

3.4

4.2

4.2

6.2

6.2

Min.

1.95

2.25

2.65

2.65

3

3

3.8

3.8

5.8

5.8

h

Min.

3.35

3.9

4.5

4.5

5.1

5.1

6.5

6.5

9.5

10.3

Max.

3.65

4.3

5.1

5.1

5.9

5.9

7.5

7.5

10.5

11.3

Weight per thousand pieces (steel)≈kg

3.2

4.8

7

7.8

12.2

13.3

21.5

23.7

42.5

68

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NEWS

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