Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 166494 found under Key Socket Head Screw by Vectronix Inc. The National Stock Number assigned to this part is 5120014701163, 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 166494.