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Drill and Tap Tool - Thread Tapping & Through Hole

Drill and Tap Tool - Thread Tapping & Through Hole

by Chewy Applications

29 ratings
41 reviews
#132 in paid Reference
🔧 Utilities
🔍 Reference
$1.99

Details

  • Released
  • Updated
  • March 14, 2011
  • May 11, 2017

Features

Developer

Chewy Applications
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📉no. 132
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⭐41
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📝5+ tags
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🔄4+ apps
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❓5 answered
FAQ↘︎
📦w/o updates
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About

Calculate the correct drill bit size for your tapping operations. Supports various thread types and inch/metric measurements. Provides precise calculations for depth of thread and clearance.

✓Metric and US Standard tap/drill support
✓Spinning dial interface for easy selection
✓Calculates drill size for tapping
✓Supports various thread types (UNC, UNF, NPT, BSP, etc.)
✓Provides drill sizes in Metric, Inch, and US No./Letter
✓Calculates percentage depth of thread
✓Calculates through-hole clearance
Show original description

What's New in Drill and Tap Tool

4.0

May 11, 2017

This update from Apple will improve the functionality of this app. No new features are included. - 64-bit compatibility added to allow app to function on future versions of iOS. - Updated UI for devices with 4.7 inch, 5.5 inch screens. - Fresh new app icon.

More

Charts

Top Paid

📉 132-5

Reference

This app dropped -5 positions in Reference chart.

Last updated on July 24, 2026.

User reviews

Most RecentHighest RatedLowest Rated

Very useful tool

Used frequently & is easy to use
99099909

Disappointed

You should advise the sizes of the threads covered.
First time I used app found it did not cover the tapping size I was after 1 1/8” unf
Maximum size covered is 1” unf
Dfihcytdhihbb in i hi kvygfDfihcytdhihbb in i hi kvygf

Best drill and tap app!!!

I’m a machinist and industrial mechanic and use this app on a daily basis, it’s so great to have all this info with me in my pocket at all times! Highly recommend this app!!!
Prodigy750Prodigy750

Stopped working, please fix!

I’ve been using this app for several years, but it stopped working, please fix it.
_R_A_G_E__R_A_G_E_

Great app won’t open

App is great but will not open on any devices. PLEASE FIX
shasta homeshasta home
See 36 more reviews

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FAQ

What does the Drill and Tap Tool app do?

This app helps you determine the correct drill bit size needed for your thread tapping operations. It supports a wide range of thread types and measurement systems, ensuring accuracy for your projects.

What types of threads does the app support?

The app supports numerous thread types including US Standard (UNC, UNF, UNEF), ISO Metric (coarse, fine), National Pipe Thread (NPT, NPS/NPP), and British Pipe Standard (BSP, BSPT).

How do I find the right drill size?

Simply select your thread type, tap size, desired percentage depth of thread, and clearance requirements. The app will then display the closest drill bit sizes in Metric, Fractional Inch, and US No. / Letter formats.

Is this app compatible with my device?

The app is compatible with iOS 10 and later versions. It is designed to run on iPhones and iPads.

Who would benefit from using this app?

This app is a valuable tool for engineers, machinists, trades-men, students, tool makers, DIY enthusiasts, fitters, turners, and fabricators who need precise drill sizes for tapping.