Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BB5-BS2K found under Parts Kit Pressure by Cashco Inc. The National Stock Number assigned to this part is 4820013861838, 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-BS2K.