I went to a local farm store and bought mine for my smittybilt bumper.. 10,000lbs rating..

 

3/4" size is correct as i have the same bumper. I also got mine from the local farm/hardware store which i think cost about $10 each. I had to do a little bit of shopping around to get a decent price. Most places were selling them around $20 each. Make sure you tighten them really good. I lost one once, but perhaps it was stolen but i suspect it just fell off.

 

Thanks gang. Didn't even think about farm supply, was just going to buy off amazon.

 

My clanked pretty well so I taped the pin with electrical tape. No more clank.

 

I'm a crane inspector and I can tell you CM is a good brand. A store that sell farm equipment is a good place. Also, crane and rigging store, Grainger and McMastercarr should have them, too. 3/4" shackle is what you are looking for.