5310-00-177-1293 (3206)
NSN 5310-00-177-1293 (NIIN 00-177-1293) 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 3206 (Aerocontrolex Group, Inc., CAGE 98889).
Key specs: 40 to 45 rockwell c hardness; full characteristics table below. NIIN assigned November 1969; DEMIL A (none required).