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

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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