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Caliper bolts specifications


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I am in the process of rebuilding brake calipers. I have separated the caliper halves. I know this isn't recommended but I needed to hone bores. I would like to verify the bolt sizes/specifications. Based on my measurements they are 7/16 by 2 1/4 UNF-20. I would assume the grade is 10.9, although the original headstamp does not identify the grade. As the brakes are rather important I would like to verify this information and know of any recommended sources for the bolts. Thanks in advance.

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