Question:

DRILL BIT SIZE FOR 12MM X 1.75 BOLT?

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DRILL BIT SIZE FOR 12MM X 1.75 BOLT?

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  1. It's close to ¼". Should say on the tap what size drill to use.  Test on a piece of scrap before you make you hole.

    http://www.korit.com/tapndrill.htm

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  2. 10.5mm drill bit closest imperial bit is a 27/64 which is a hair larger

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