Wheel Hub, made from ductile iron, installed with Inner Cup #LM501310 & Outer Cup #LM67010. 6 bolt holes equal spaced on pitch circle diameter 6"  .For Case IH Disc Harrows, Fits Models 485, 496, 501, 760, 770, 3800, 3850, 3900, 3950, For Case-IH field cultivator transport wheels on 45 (over 13 ft.), 4300, 4500, 4700, 4900. Caster wheels on 4300., For Case IH Soil Finishers, Fits Models 4200, 4400, 4450, And For Case IH Ripper Transport Wheels on 690m MRX690. Replaces OEM# 606468R21