505239M1 Trunion Pin Support Shaft Fits Massey Ferguson Tractors 50B 168 178 185One New Aftermarket Replacement Trunion Pin Support Shim that Fits Massey Ferguson Industrial Construction Models: 50B, 50B MKII Also Fits Massey Ferguson Tractor Models: 165 UK, 168, 175 UK (S N 724937>), 178 (S N 724937>), 185, 188, 265S, 275 UK, 285S, 290, 340, 342, 350, 352, 355, 360, 365, 372, 375, 390, 390T, 398, 399, 565, 575, 590, 675, 690, 698 Dim A (1) 1 29 32 x 2 5 8" Dim B (2) 0. 039" Wide Replaces Part Numbers: 505239M1, VPJ1428,