Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NH AA B4FN found under Battery Wet Primary by Sony Electronics Inc. The National Stock Number assigned to this part is 6135015949930, 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 NH AA B4FN.