Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AYRF57-0-0-04 found under Ring Retaining by Ge Aviation Systems Llc. The National Stock Number assigned to this part is 5325007984730, 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 AYRF57-0-0-04.