Fits Ford Tractors: 2000, 3000, 4000, 600, 601, 700, 701, 800, 801, 8N, 900, 901, NAA. Years: 1948 & Up Rear Wheel Stud (Fluted Shoulder) With Serrated Shoulder For Rear Brake Drum. 5/8"-18 Thread x 0.690" O.D. On Serration.