5310-01-332-7092 (10122207)
NSN 5310-01-332-7092 (NIIN 01-332-7092) is a spring tension washer in Federal Supply Class 5310, Nuts And Washers — a bent spring metal washer with a centrally located hole. Manufacturer part number 10122207 (Nimikkeistokeskus Ncb Finland, CAGE A486G); also referenced as M12133/1-1, MIL-W-12133/1 (Military Specifications).
Key specs: 45 to 52 rockwell c hardness; full characteristics table below. NIIN assigned January 1991; DEMIL A (none required); unit of issue EA (each), $7.77 gov standard price; ships at 0.001 lb / 0 cu ft.