The separator nuts are designed to screw on in place of the joint nut and bottom out on the end of the joint thread. Impact nut thread sizes include: M10 x 1.5, M12 x 1.25, M12 x 1.5, M14 x 1.5, M14 x 2.0, M16 x 1.5, M16 x 2.0 and M24 x 1.5.