Set of 4 Rockshaft Cylinder Front Studs Fits Massey Ferguson Tractor ModelsOne Set of Four (4) New Aftermarket Replacement Front Rockshaft Cylinder Studs Fits Massey Ferguson Tractors Tech Info: 9 16x3 UNF Replaces Part Numbers: 1667579M1, 1667580M1, 1667580M2, 899258M1 Fits Models: 1080, 1200, 133, 135, 140, 152, 158, 165, 168, 175, 178, 185, 188, 20C, 20D, 20F, 265, 275, 285 (FR), 290, 30B, 30D, 30E, 340, 342, 350, 352, 355, 360, 362, 365, 372, 375, 375E Brazilian, 382, 390, 390E Brazilian, 390T, 398, 399, 40B, 40E, 415