Lockring

A lock ring is a threaded washer used to prevent components from becoming loose during rotation. They are found on an adjustable bottom bracket and a track hub of a bicycle.

For the Bronze Age jewellery, see Lock ring.
Locking washers, size M4

Lokring is another form of fastener used in the automotive and air condition industries: these fittings are often confused with lockrings.

See also
  • The dictionary definition of lockring at Wiktionary

References
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