This is a pic of a Cad Drawing of the latch on my bumper. I bought the original bumper and swing arm from: Kennesaw Mountain Accessories. Other than the latch I have been very happy with the bumper and arm. The arm holds a 36" supper swamper.

Pin that holds swing arm to bumper. The pin is welded on the front and the back of the 1/2" plate for extra stranth, then the plate was welded to the bumper.

Another look at the pin that holds the bumper

Swing arm attached to Bumper. The swing arm rests on the bumper, and a cotter pin holds the arm on the pin. There is a chain that holds the cotter pin to the swing arm.

Swing arm latch. The plate on the Swing Arm is made from 1/2" steel plate. This is over kill, but I wanted it to be strong after how it broke at WITC.