Contact lock washer, NF E25-511, Disc spring lock washer, electrical appliances lock washer, Disc spring

Contact lock washer    NF E25-511

Material : spring steel

Finishing : Galvanized Cr3

Size

D1

D2

H

s

M3

3.1

8

1

0.6

M4

4.1

10

1.4

0.9

M5

5.1

12

1.8

1.1

M6

6.1

14

2.1

1.3

M8

8.2

18

2.35

1.4

M10

10.2

22

2.75

1.6

M12

12.4

27

3.1

1.8

M16

16.4

32

4.1

2.8

M20

20.5

40

4.9

3.2

Special features contact-lock washers type medium:

-      suitable for use simultaneously as lock washer and plain washer with oversize or elongated holes

-      no damage to surface, exceptional locking action and high elasticity to compensate play or setting

-      excellent contact in electrical appliances avoiding overheating

-      applicable for bolts with a property class ≤ 10.9

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