Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 0.050-3 found under Blade Socket Head Screw Key by Allen Mfg Co. The National Stock Number assigned to this part is 5120000151305, 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 0.050-3.