Part number 21506 appears under 12 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.

5120-00-752-9031 — PUNCH,DRIVE PIN · FSC 5120
6625-01-070-5910 — LEAD SET,TEST · FSC 6625
4820-01-338-2293 — CAP,VALVE · FSC 4820
6685-01-289-0950 — CONTROL,TEMPERATURE,INDICATING · FSC 6685
5120-01-123-0132 — INSERTER,SEAL · FSC 5120
2930-01-567-1278 — COOLER,LUBRICATING OIL,ENGINE · FSC 2930
1680-00-760-3094 — CONTROL ASSEMBLY,PUSH-PULL · FSC 1680
6610-00-919-2740 — DIAPHRAGM ASSY · FSC 6610
1005-01-705-8245 — SEAR · FSC 1005
4820-01-228-7804 — RETAINER,DISK,VALVE · FSC 4820
2990-01-059-9440 — PISTON · FSC 2990
1650-00-168-5784 — CAP,VALVE · FSC 1650