Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 420 831 415 found under Ring Retaining by Bombardier Aerospace. The National Stock Number assigned to this part is 5325012234351, 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 420 831 415.