Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CWK647-3REVB PI found under Seal Valve by Walz And Krenzer Inc. The National Stock Number assigned to this part is 5330001103977, 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 CWK647-3REVB PI.