Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BB-659 found under Wear Strip Ballast by Sei Industries Ltd. The National Stock Number assigned to this part is 5330219208146, and the Federal Supply Class is 5330 Packing And Gasket Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like BB-659.