3020-00-722-3021 (907M620001)
NSN 3020-00-722-3021 (NIIN 00-722-3021) is a sprocket wheel in Federal Supply Class 3020, Gears, Pulleys, Sprockets, And Transmission Chain — a toothed wheel whose teeth or sprockets are designed to be engaged with the links of a pitch chain, track, or the like. Manufacturer part number 907M620001 (Cosmos Industries Inc, CAGE 94486).
Key specs: 28 minimum rockwell c and 32 maximum rockwell c body metallic hardness; rockwell hardness test method; full characteristics table below. NIIN assigned January 1963; DEMIL A (none required); unit of issue EA (each), $348.02 gov standard price; export Schedule B 8483.90.1000.