Fastening & Joining

Locking Devices

Nov. 15, 2002

Externally threaded fasteners with locking devices use the same techniques as locknuts.

Externally threaded fasteners with locking devices use the same techniques as locknuts. Prevailing-torque locking screws employ distorted threads, interference fits, inserts, or a chemical adhesive coating. Free-spinning locking screws and bolts have a locking feature incorporated into the head, or an additive on the threads.

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