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Old 04-13-2012, 08:46 AM   #11
rotorwrench
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Join Date: Jun 2010
Location: San Antonio, Texas
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Default Re: Cleaning threaded block holes

A person can still get about any size wire brush from outfits like Grainger & McMaster Carr. Chuck one in a drill and add a squirt of your favorite bore cleaner (I always like the smell of Hoppe's) and go to town. It's a lot faster than running a tap in 48 plus holes for sure.
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