Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number X21-564-16 found under Cover Electrical Connector by Bofors A B. The National Stock Number assigned to this part is 5935011847188, 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 X21-564-16.