Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 66D25643-3 found under Seal Nonmetallic St by Volumatic Inc. The National Stock Number assigned to this part is 5330006317633, 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 66D25643-3.