Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 381 1 8 IN found under Packing Material by Anchor Packing Co The. The National Stock Number assigned to this part is 5330011261339, 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 381 1 8 IN.