3020-00-946-9494 (X71016)
NSN 3020-00-946-9494 (NIIN 00-946-9494) 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 X71016 (United States Postal Service, CAGE 88001); also referenced as 25B9 (Diamond Chain Co Div Of Amsted).
Key specs: not rated hardness test method; full characteristics table below. NIIN assigned March 1966; DEMIL A (none required); export Schedule B 8483.90.1000.