Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BB5-1S27-1J000000A found under Valve Regulating Fl by Cashco Inc. The National Stock Number assigned to this part is 4820013858943, 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 BB5-1S27-1J000000A.