Pitman Arm Steering Pitman Arm Castle Nut Included:Yes Center Link End Attachment Diameter:12 mm Color:Black End 1 Attachment Type:Spline End 2 Attachment Type:Male Taper Finish:Coated Length:130.5 mm Lubrication Type:Sealed Material:Steel Mounting Hardware Included:Yes Package Contents:Pitman Arm, Castle Nut, Cotter Pin Spline Quantity:42 Steering Shaft Diameter:27 mm