Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A 228SR 855 70 found under Packing Preformed by Stillman Seal Corporation. The National Stock Number assigned to this part is 5330005605627, 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 A 228SR 855 70.