ToolDrill bit size chartEvery drill bit size in inches and millimeters: fractions, number drills #80 to #1, letter drills A to Z and metric, with a converter that finds the nearest drill in each series.ToolTap drill size chartTap drill sizes for every common thread: 1/4-20 takes a #7 drill, 10-24 a #25, 3/8-16 a 5/16 in, M6 a 5 mm. With % of thread, clearance holes and a finder.
Coming soon
Pages being written for this section.
- 1/4-20 tap drill size
- What size drill bit for a #8 screw
- Types of drill bits
- How to drill into concrete
- How to tap a hole