Pitman Arm Steering Pitman Arm Castle Nut Included:Yes Center Link End Attachment Diameter:1/2 In. Center Link End Attachment Pitch:20 Color:Black End 1 Attachment Type:Spline End 2 Attachment Type:Taper Finish:Coated Length:136 mm Lubrication Type:Greasable Material:Steel Mounting Hardware Included:Yes Package Contents:Pitman Arm, Castle Nut, Cotter Pin, Zerk Fitting, Nut, Foam Washer Spline Quantity:36 Steering Shaft Diameter:28 mm