1/2 dozen 9/16 grade 8 bolts to hold the hitch to the frame
4 more to hold the ball part of the trailer to the toungue
2 even larger bolts hold the two pieces together that make up the ball and receiver assembly, and mine came with shims to be sure there was no freeplay in there.
a 1" shank ball isn't strong enough, so you gotta get a 1 1/4" shank ball.
And then you gotta bolt this together at hundred of pounds of torque.
The only thing really keeping the trailer attached is a 1/2" pin that isn't torqued in at all, rattles in it's holes and weighs less than one of the bigger nuts.
If the pin is strong enough then everything else seems to be overkill.
Originally Posted by zx5chris
Don't forget about the toque that is applied to the verticle load. The retaining pin doesn't have to deal with this additional load, and the pins usually solid. so I don't really think of this issue.