Pitman Arm Steering Pitman Arm Castle Nut Included:Yes Center Link End Attachment Diameter:5/8 In. Center Link End Attachment Pitch:18 Color:Black End 1 Attachment Type:Spline End 2 Attachment Type:Male Taper Finish:Coated Length:153.25 mm Lubrication Type:Greasable Material:Steel Mounting Hardware Included:Yes Package Contents:Pitman Arm, Castle Nut, Zerk Fitting, Cotter Pin Spline Quantity:32 Steering Shaft Diameter:28 mm