Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5171975 found under Ring Retaining by Mtu America Incorporated. The National Stock Number assigned to this part is 5325008042784, 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 5171975.