Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4-57696A found under Battery Nonrechargeable by Marconi Mobile Spa Ex Elmer Spa. The National Stock Number assigned to this part is 6135011368306, 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 4-57696A.