We now offer our Main Stud and washer kit. This kit includes 10 of our special 6 point, Fine thread (1/2"-20) Main Stud nuts which feature the molded in circular lower flange to ensure evenly distributed pressure on the main caps and washers. Also includes 10 of our extra thick hardened and parallel ground main stud washers as well. These are the same nuts and washers included in our Main Girdle kits. They also work great with our 129-1039 Girdle Main Studs.