Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TR42 found under Wrench Wheel Stud Nut Shock Type by Summit Tool Company. The National Stock Number assigned to this part is 5120005856239, 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 TR42.