Welded King Pin for truck trailer and heavy duty

The function of the kingpin is to engage the semi-trailer to the fifth wheel.
The kingpin is the most critical component used in the load transfer from semi-trailer.
The D-value and the thickness of the welding plate are two considerations in choosing a kingpin for a semi-trailer.
The actual D-value of the selected kingpin must be larger than the calculated D-value. Then determine the thickness of the skid plate.

2 inch and 3.5 inch type is available.
Welded and bolted is available.