Machinist Drill Bit Size Table
59 rowsu2002·u2002ANSI and ISO Twist drill size chart Fractional and Metric Sizes per. ANSI/ASME B94.11M-1993 below are the standard size drill bits used and readily available in industry. Fractional sizes are measured in inches, while metric sizes are measured in millimeters. The drill size chart contains twist drill data for up to 1.0 inches in diameter.
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