Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BB 9001603 02 found under Cap Valve by L3 Communications Corp. The National Stock Number assigned to this part is 4820016687487, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like BB 9001603 02.