Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5M20 found under Battery Nonrecharge by American National Standards Inst. The National Stock Number assigned to this part is 6135007289859, 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 5M20.