A circlip, also known as a snap ring, is a circular fastener used to secure components onto shafts or within housings. It fits into a groove on a shaft or in a bore, preventing axial movement of parts such as bearings, gears, or pistons, and ensuring stable assembly and operation of mechanical systems.

This 38mm circlip serves as the camshaft retaining circlip for 125cc scooter engines with the following codes: 152QMI-A