Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number L-5-2555 found under Key Socket Head Screw by Ngk Metals Corporation. The National Stock Number assigned to this part is 5120001892991, 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 L-5-2555.