SAF-Holland’s kingpin system

Updated Feb 24, 2016

HollandSAF-Holland’s 2-inch AAR Kingpin system for hot-dip galvanized upper couplers features a specially machined kingpin housing and kingpin. The kingpin housing is welded into the trailer’s upper coupler prior to galvanization to facilitate added coupler corrosion protection.

After galvanization, the replaceable kingpin is installed into the housing with a nut and collet fastener, which allows the kingpin to remain removable and replaceable over the trailer’s life and impede exposure to harsh chemicals and temperatures. The system is designed to be compatible with ¼-inch, 5/16-inch and 3/8-inch bolster plates.