Larry, All of my Model 28s ( 2 ASRs, 2 KSRs, 1 RO, and a stand alone table mounted ROTR have 1/2-18 x 1 1/2" leveling bolts. The Model 32,33, 35, and 37 are different. I can measure them if you want me to. I will send you an image. Don K9TTY