+I have a situation where I can not put a normal 5/8 inch hitch pin through the hitch receiver and the inserted 2 inch shank because they do not exactly line up. I can not get a drill into position to enlarge the hole to accept the 5/8 inch pin because of the under carrage metal around the bumper and the hitch receiver. I can insert a 9/16 inch bolt ok. The question I have, is a 9/16 bolt either grade 5 or grade 8 as strong (shear strength) as a normal 5/8 inch hitch pin you purchase from commercial suppliers. I have been unable to find any information on regular 5/8 inch hitch pin shear strength. I can find shear strength info on different grade and diameter bolts. Somewhere there must be an person that is knowledgeable of hitch pin specifications. I have a trailer that has about 1000 lbs. hitch weight and a GVWR of 10,500 lbs. Any help would be greatly appreciated.