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Disc-LockTM Wedge Locking Washers


Features and Benefits
  • Heavy-duty, self-locking design
  • For use with bolts up to Class 10.9, Grade 8
  • Available in sizes from 1/4" (M6) to 1-1/2" (38MM) Other sizes available by special order.
  • Available in 316L Stainless Steel
  • Carbon Steel washers are case hardened and coated with RoHS-compliant Delta Protekt™
  • Provided in pre-assembled, glued pairs
  • Easy to install with standard tools
  • No re-tightening needed once installed
  • Vibration proof according to MIL-STD-1312-7


How Does It Work?
Disc-Lock washers consist of two washer-shaped pieces which have cams on one side and ridges on the other. The cam sides are mated together and then installed between the nut and the joint material.


As the nut is tightened, one half of the Disc-Lock washer is seated to the joint material, and the other is seated to the nut.


When the joint experiences vibration and shock, the nut will attempt to rotate loose. As this happens, one half of the Disc-Lock washer will attempt to rotate with the nut – when it does this, the other half of the washer, with its interlocking cams will provide opposite force, prohibiting movement. Preload will be maintained and the assembly will be locked.


The angle of the cams is greater than the pitch angle of the thread on the bolt; the cams and the non-slip ridges of the Disc-Lock washer work together to stop any movement. As the bolt contracts, the inclined planes of the cam will cause the nut to rotate back to its original position.

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