Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 381573-001 found under Battery Assembly by Hewlett Packard Co. The National Stock Number assigned to this part is 6135015553150, 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 381573-001.