For allen head bolts, put the wrench in the hole and use a center punch(A real one, with a hammer, not one of the spring ones) on each of the flats of the bolt to tighten the bolt against the allen wrench. Then have a helper use the same center punch to drive the bolt in a loosening direction while you're applying torque to the allen wrench. Your hand impact driver might do the same thing.
You can also use a Torx bit just slightly larger, and hammer it into the allen bolt. Obviously this creates a sacrificial situation for both the bolt and the Torx bit.
Quote:
Originally Posted by tdoublenastywitit
Hot damn... Now we are making threads about how to turn a bolt....
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I'd rather give some tips on how to turn a bolt............than give tips on how to turn the same bolt after the head's been stripped.