Part number 21721 appears under 10 stock numbers

Manufacturers reuse part numbers across items. Each stock number below is its own federal item record — pick the one your drawing or solicitation cites.

3455-01-047-4285 — REAMER,MACHINE · FSC 3455
1650-00-757-5080 — PLATE,SEAL · FSC 1650
2930-01-566-7785 — COOLER,LUBRICATING OIL,ENGINE · FSC 2930
3120-01-266-8500 — BUSHING,SLEEVE · FSC 3120
1377-00-872-5700 — HEAD ASSY,SAFETY · FSC 1377
2040-00-841-8823 — PARTS KIT · FSC 2040
5930-01-633-4875 — GUARD,SWITCH · FSC 5930
1680-01-492-4790 — FLANGE MOUNTING · FSC 1680
5307-01-229-6261 — STUD,PLAIN · FSC 5307
5998-01-074-2503 — CIRCUIT CARD ASSEMBLY · FSC 5998