Description Bolt, front wheel, tapered, 1/2" x 1" NF threads. For tractors: MF231, MF240, MF250 except Lo-profile, MF253; industrials: 20D turf or adjustable axle. Replaces 887135M1. This item is a suitable alternative for the following: 906863M1, 1013274M1, 641513M1, 7004170M1, 850187, 887135M1, A-WB12, AWB12, 1076746M1, 512581M1