Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A-A-59158 found under Tang Breakoff Tool Screw Thread by Federal Commercial Item Description. The National Stock Number assigned to this part is 5120001169596, and the Federal Supply Class is 5120 Hand Tools Nonedged Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like A-A-59158.