Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A3100-0031 found under Ring Retaining by Bae Systems. The National Stock Number assigned to this part is 5325002635954, 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 A3100-0031.