Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 103005977-5591 found under Battery Set by Eaton Corporation. The National Stock Number assigned to this part is 6135016543958, and the Federal Supply Class is 6135 Batteries Nonrechargeable. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 103005977-5591.