Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number E12638W found under Seal Plain Encased by Blaw Knox Corp. The National Stock Number assigned to this part is 5330002253638, 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 E12638W.