5315-01-014-5228 (00-K-220)
NSN 5315-01-014-5228 (NIIN 01-014-5228) is a machine key in Federal Supply Class 5315, Nails, Machine Keys, And Pins — a metallic item, usually square or rectangular in cross section, usually longer in relation to its width and thickness, with or without a head. Manufacturer part number 00-K-220 (Federal Specifications Promulgated, CAGE 81348); also referenced as MS20066-44 (Military Standards).
Key specs: 40 to 50 rockwell c overall hardness; full characteristics table below. NIIN assigned December 1975; DEMIL A (none required); unit of issue EA (each), $5.58 gov standard price; export Schedule B 7207.20.0000; ships at 0.1 lb / 0.0028 cu ft.