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Tab Washer

Tab washers 

Tab washers are a type of lock washer, round in shape and often manufactured with a single tab or multiple tabs and notches that can be formed to shape around bolts and nuts. These washers are ideal for use in harsh environments, effectively locking a part into place in applications requiring extreme heat conditions or heavy vibrations.

Locking tab washers

Locking washers are often bent after assembly to stop rotation and have replaced the use of locking pins and castle or slotted nuts.