Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 60 170 4 found under Ring Retaining by Bauer Nilsen A S. The National Stock Number assigned to this part is 5325251502496, and the Federal Supply Class is 5325 Fastening Devices. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 60 170 4.