Tap and Drill Chart

Most tap and drill charts don't make a distinction between thread-cutting and thread-forming taps, but the difference is important! Holes for thread-forming taps must be larger than those for thread-cutting. That's generally not a problem, but thread-forming taps are more common with small hole sizes.

Hole sizes in the tables below are for thread-cutting taps:

Table Continued

If you have specific questions about thread-cutting and thread-forming taps, feel free to email us at quote@oshcut.com

If you are ready to get started, you can get your instant online quote here.