Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 20711721-7 found under Battery Assembly by General Dynamics Corporation. The National Stock Number assigned to this part is 6140016991080, and the Federal Supply Class is 6140 Batteries Rechargeable. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 20711721-7.