Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BPF-1 found under Cap Plug Protective Dust And Moi by Protective Closures Co Inc. The National Stock Number assigned to this part is 5340004539351, and the Federal Supply Class is 5340 Hardware Commercial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like BPF-1.