Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number U171 found under Seal Oil by Braden Carco Gearmatic. The National Stock Number assigned to this part is 5330003686247, 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 U171.