Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NHTNB1212M found under Socket Socket Wrench by Napa Automotive Parts Co. The National Stock Number assigned to this part is 5120010246148, 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 NHTNB1212M.