Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 451-11257 found under Battery Storage by Dell Marketing Lp. The National Stock Number assigned to this part is 6140016032596, 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 451-11257.