M14 THREAD REQUIRES 12.0MM DRILL BIT. M3 THREAD REQUIRES 2.5MM DRILL BIT. M4 THREAD REQUIRES 3.3MM DRILL BIT. M5 THREAD REQUIRES 4.2MM DRILL BIT. M6 THREAD REQUIRES 5.0MM DRILL BIT. M8 THREAD REQUIRES 6.8MM DRILL BIT.
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