King pin 2 Inch Kingpin ,3.5 Inch Kingpin 50#,90# bolt-in type ,welding type / Welded type King pin2 Inch Kingpin ,3.5 Inch Kingpin50#,90# bolt ... undergoes over 1.2 million times of Fatigue testing and built to meet or exceed national industry standards. 2 inch ,3.5 inch Kingpin for ...