Tap Drill Pocket

Find tap drill, form tap, and clearance hole sizes in seconds. Offline thread charts, custom drill kit, NPT presets, no subscription.

Stop hunting through oily wall charts and half-broken calculators. Tap Drill Pocket gives machinists the tap drill, form tap, and clearance hole sizes they need in seconds.

Built for workbench use:

• 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

Tap Drill Pocket is a reference tool for trained users. Verify critical jobs against your shop standards, material specs, and tap manufacturer's guidance.