Steel machine screws of diameters No. 6 to 1/2” inclusive, which are shorter than either 1/2” or 3D (where D is the nominal screw size in inches) are not subject to tensile testing. Such steel machine screws of a size to be tested shall meet the tensile 23 rows Machine Screw Size Chart and Conversion Tables. A #8 screw size is .164 fraction of an … US Machine Screw Diameter and Thread Chart Our printable 'lay-over' sizing chart for identifying US machine screw diameter and thread count. Metric Machine Screw Diameter and Thread Chart Our printable 'lay-over' sizing chart for identifying metric machine screw diameter and thread pitch. Drive Sizes For. Phillips; Star drive

Machine Screw and Drill Size Chart (English ) Clearance Hole Drills Screw Designation Tap Drill Size Close Fit Loose Fit Number Diameter Pitch Tap Size Drill Diameter Drill Diameter Drill Diameter or dia. (inch) (threads/inch) Size (inch) Size (inch) Size (inch) #0 0.06 80 0-80 3/64 0.0469 52 0.0635 50 0.07 Screws with a diameter smaller than 1/4 have a nominal size indicated by a number (e.g. #8 or #10). 1/4 and larger diameters are shown as inches . The diameter refers to the major diameter, or outside edge, of the threads. If the screw size includes a dash with a number following it, that is the number of threads per inch (tpi). Reference Guide features screw size tap drill chart for 75% thread depth Morse Machinist's Practical Guide for Pocket or Toolbox - A Machinist Handbook to Reference Information on Cutters, taps, Dies, Drill bits, endmills and Much More General info.

IMPORTANT: Make sure to print this chart to Actual Size (no scaling). After printing, measure the ruler in the margin to ensure correct scale. US Machine Screw Sizes