Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 5020LB found under Battery Nonrecharge by Spectrum Brands Inc. The National Stock Number assigned to this part is 6135015156600, 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 5020LB.