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Tap Drill Pocket

Thread charts for the shop bench

For makers$2.99Version 1.0.0iOS 17.0 or later
View on the App Store
Tap Drill Pocket screenshot 1 Tap Drill Pocket screenshot 2 Tap Drill Pocket screenshot 3

About Tap Drill Pocket

Tap Drill Pocket is an offline tap drill, form tap, and clearance hole reference for machinists and workshop users. It supports inch, metric, UNC, UNF, NPT, NPS, and common machine screw threads, with custom drill-kit filtering so users can see the sizes they actually have.

What it does

  • Cut tap drill recommendations with adjustable thread percentage
  • Form tap drill calculations
  • Clearance hole fit options: close, normal, free
  • Inch, metric, UNC, UNF, NPT, NPS and common machine screw threads
  • Number, letter, fractional, and metric drill sizes
  • Custom drill kit: show the nearest sizes you actually own
  • Favorites and recent threads for repeated shop work
  • Works completely offline, with no account and no subscription