Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 043921009 found under Ring Retaining by L 3 Communications Elac Nautik Gmbh. The National Stock Number assigned to this part is 5325121515609, 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 043921009.