Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4 47X1 78W175A found under O Ring by Trelleborg Sealing Solutions Conde. The National Stock Number assigned to this part is 5331143024571, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 4 47X1 78W175A.