Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number E21329-00 found under Ring Retaining by B E Aerospace Inc. The National Stock Number assigned to this part is 5325008046855, 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 E21329-00.