Steel Shock One Nut Stud Kit. Kit contains 14ea ST364-820G5 steel shear nuts,2ea SD501-213 studs, 2ea SD501-275 studs, 2ea TD501-750 studs, and 2ea SD503 studs. Studs are heat trerated to a Min. UTS 160Ksi. and have hot forged hex and rolled threads.