Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CKB3407A found under Seal Plain Encased by Coltec Industries Inc. The National Stock Number assigned to this part is 5330001784620, 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 CKB3407A.