Cargo Carrier for trailer hitch

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I've been toying with the idea of making a Cargo Carrier that will work with my trailer hitch. I have a 2" receiver on my Tahoe that is rated over 8000# towing capacity.I'm not an Engineer and at the moment I'm stuck on the size of the 2" sq tube I should use that would get inserted into the receiver hitch. I'm thinking a 2x2x.187 should work as I don't expect to carry anything near 600# on the cargo carrier.What do you think, is 3/16" think 2x2 sq tube enough?
Reply:By far... the commercial ones hold about 500 lbs.  And they are much thinner wall. I made a new one because I wanted different features a few years ago. And used 11 ga tubing. I had held about 700 lbs without deflecting too much.  But I would go 1/4 inch if I had more to carry.  It is easy to get and have used it for decades. Sent from my SM-G960U using TapatalkI haven't built anything I can't throw away.  Perfection is the journey.    Mac
Reply:I use only 1/4" wall tubing for al my hitches. No worries that way.ChrisAuction Addict
Reply:I use 1/4” wall 2x2…that way there is not failure issues.  I have several implements I have made…cargo rack, roof rack rear crossmember for extra weight or long items, vice, grinder, winch…lots of things.I have a Tahoe as well, think about what you may haul…so that you make it wide enough without blocking the tail lights…