Lockring

For the Bronze Age jewellery, see Lock ring.

Locking washers, size M4

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.

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