Part number 1B3 appears under 5 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.

4730-00-273-3398 — ADAPTER,STRAIGHT,PIPE TO HOSE · FSC 4730
5960-00-453-5281 — CAP,SOCKET · FSC 5960
5985-01-016-6928 — ATTENUATOR ASSEMBLY · FSC 5985
2040-01-260-1888 — SHIM BRACKET 1B3 · FSC 2040
5915-01-026-8569 — FILTER,RADIO FREQUENCY INTERFERE · FSC 5915