This 5mm C-clip has several use in the Air Cooled VW model series over various years. A c-clip is a semi-flexible metal ring with open ends that snaps into place.
1956-1966 Beetle Secures Remote Rod to Door Check Mechanism 1964-1967 Type 2 Bus Secures Front Door Check Rod Pin - Chassis 1222026 1964-1967 Type 2 Bus Secures Engine Compartment Lid Stay Roller - Chassis 1222026 1961-1973 Type 3 Secures Remote Rod to Door Check Mechanism