Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BJ1000B-1S found under Cock Drain by Auto Valve Inc. The National Stock Number assigned to this part is 4820013253945, 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 BJ1000B-1S.