Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number X21-516-4A found under Clamp Cable Electrical Connector by Bofors A B. The National Stock Number assigned to this part is 5935002400173, and the Federal Supply Class is 5935 Connectors Electrical. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like X21-516-4A.