A hitch pin is made to handle over 20,000 lb. You'll tear your hitch off before it breaks. If you're worried about theft, get a locking pin.
Re: locking pins... I had one once... A good one... And within a year it froze up and the lock was as worthless as a screen door on a submarine.. It took a saws-all with a special blade to get rid of that pos... I don't need a lock now - just remove the hitch and put it in the storage compartment in the truck..
Overall, and coming from someone who's farmed, helped uncles who farmed, (and now work for a farmer with serious equipment) and who has pulled everything from soup to nuts, I'm with those above; get a hitch pin and call it good.. JMVHO...
