Union Millwright Charts



Union Millwright Reference Charts







Charts are in PDF format

  • Metric and Inch Equivalents

  • Millimeter to Inch Conversion Table

  • Inch to Millimeter Conversion Table

  • Decimal Equivalents of Letter Size Drills

  • American Standard Pipe Thread and Tap Drill Sizes

  • Millimeter Tap Drill Sizes

  • Double Depth of Screw Threads

  • American Standard Acme Screw Thread Dimensions

  • General Guide for Cutting Speeds and Feeds for Drills

  • High Temperatures Judged by Color and Colors for Tempering

  • Triangle Chart

  • Decimal Equivalents of 8ths, 16ths, 32nds, 64th

  • Decimal Equivalents of Number Size Drills

  • American National and Unifi ed Coarse and Fine Thread Dimensions and Tap Drill Sizes

  • Tap Drill Sizes For Fractional Size Threads

  • ISO External Threads Medium Fit

  • Tapers and Angles

  • Temperature Conversion

  • Rules Relative to the Circle