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Old 06-20-15, 06:22 PM
  #11  
rhm
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If you do force a 12 x 1 bolt into the tool to chase the threads out, grind a groove or flute (or two) through the threads so there's a bit of a cutting edge (probably rather dull, but better than nothing) and space for removed material to accumulate. And use plenty of oil (the flutes will serve as an oil reservoir as well).
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