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Old 08-30-2012, 09:33 PM
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A thread chaser is a tool used to straighten up threads instead of cutting new ones like a tap will. You use it the same way as a tap. Use anti seize on the chaser when using it to make it easier to do it's job. You should be able to get one online or at a good auto supply store. I believe you will need a 7/16"-20 thread chaser which is the same size & pitch as the bolt.
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