Today I was working on a project and discovered I needed a 5/16" allen (hex) key wrench to continue. I looked through what I had in the toolcase, and all the sets stopped at 7/32" as the largest size. Well, there was one oddball set I had that had a 1/4" hex key, but that was the biggest. I needed a 5/16". Sigh. I did have a few that were bigger, but they were much bigger. For xmission drain plugs and the like. But no 5/16".
I looked at Harbor Freight website, there’s a retail outlet of theirs nearby, but according to their website, they didn’t have any 5/16" hex keys in any of their sets either. 5/16" hex keys are availble from other vendors, but I’d either have to go to a different tool store, none near by, or buy one on the internet.
So here’s what I did. I found a 5/16" bolt and two nuts. The 6 sided head of the bolt fits exactly. I put the two nuts on together on the end, then tightened them against each other, so they are locked together. I think this technique is called a “jam nut”.
Anyway, then I put the head of the bolt into what I wanted to remove, and used a wrench on the two jammed nuts to twist the bolt, and, voila, it worked like a charm!
What I needed to remove with the 5/16" hex key didn’t require much force to free. Because I was untightening, this might not work if you need to remove something that is really stuck. In a pinch – if you had a welder – you could probably weld the two nuts to the bolt and then it would be good and strong.
Anybody have other solutions to this problem, needing a hex key of some size, and not having it, so you make it yourself?
Is there a better method, other than welding, so the un-tightening doesn’t cause the “jam nut” double-nuts to become unlocked?