Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 31-00054-030 found under Battery Assembly by Cxr Larus Corporation. The National Stock Number assigned to this part is 6135013916515, 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 31-00054-030.