5325-00-948-9875 (RD16669-237S)
NSN 5325-00-948-9875 (NIIN 00-948-9875) is a retaining ring in Federal Supply Class 5325, Fastening Devices — a resilient metal item, circular or nearly circular, which is designed to be inserted into an internal or external groove and retained by its own spring action. Manufacturer part number RD16669-237S (Hydro-Aire Aerospace Corp., CAGE 51663); also referenced as RRT237S (Spirolox Inc).
Key specs: 185000 psi minimum tensile strength; full characteristics table below. NIIN assigned April 1966; DEMIL A (none required); unit of issue EA (each), $29.02 gov standard price; export Schedule B 9606.10.0000.