Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BPK-2431 found under Packing Assembly by Nash Engineering Company Inc The. The National Stock Number assigned to this part is 5330013811126, 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 BPK-2431.