Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 532172A4 found under Washer Spring Tensi by Elsag Bailey Inc. The National Stock Number assigned to this part is 5310012765700, and the Federal Supply Class is 5310 Nuts And Washers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 532172A4.