5310-00-968-3050 (C057A3)
NSN 5310-00-968-3050 (NIIN 00-968-3050) is a plate self-locking nut in Federal Supply Class 5310, Nuts And Washers — a nut with a flanged base of varied shapes which may be plain or mounted by rivets, bolts, welding or integral prongs. Manufacturer part number C057A3 (Lockheed Martin Corporation, CAGE 81755); also referenced as MK4400-3K1 (Howmet Global Fastening Systems Inc); MA14640-02 (Sps Technologies, LLC); RMLHA6969K1-02 (Esna, LLC); MT13S1032K1 (Republic Fastener Mfg. Corp.).
Key specs: 36 to 40 rockwell c hardness; full characteristics table below. NIIN assigned June 1966; DEMIL A (none required); unit of issue EA (each), $16.18 gov standard price; export Schedule B 7318.16.0000; ships at 0.005 lb / 0 cu ft.