Machine Screws Drill/Tap Info


**** Note Our App was designed for Android 8 and below ***
If your device is running Android 9 and up, our app may not work properly.
Verified working Samsung Galaxy S9, S10, Note 10+, LG G6 for example.
Working on an update, but is a full re-write in Kotlin and is taking a lot longer than expected. If you have purchased recently (after December 2019) and the app is not working on your device, and need a refund, please contact us at with your purchase details.

Android's first and best drill chart and tap drill information app for machine screws with thread sizes, tap drill diameter sizes, clearance holes, STI drill information, & suggested max torques. Handy fraction to decimal drill chart and NPT / NPS / BSPT / BSPP pipe thread charts included.

No special scroll wheels, great dimension graphic, fast drill chart, accurate - true data from the handbooks for the thread sizes you need.

Quick and easily searchable drill chart gives just about every standard drill bit size #0000-160 through 41.6 mm (1.6378) with associated screw size(s).

Great reference for machinists, shops, designers, engineers & at home use.

Supported screw sizes:
English: #0000-160 through 1-11/16-18 (UNC, UNF, UNS, UNEF, ME)
Metric: M0.30x0.08 through M36x3.0 course, fine, extra fine, and micro sizes
British: BA (#25 -> #0), BSF (3/16-32 -> 1-1/2 -8), BSW (1/16-60 ->1-1/2 -6) sizes

United National Coarse (UNC), United National Fine (UNF), United National Extra Fine (UNEF), United National Special (UNS), Metric Course, Metric Fine, Metric Extra Fine, (ME) Model Engineering, (BA) British Association Standard, (BSW) British Standard Whitworth, (BSF) British Standard Whitworth Fine

** Network Access is for Android Market License and to allow the application to go to the Web for "Support & Info" in the "About" Menu Button.

- English
- Españoles
- 한국

Localization support for:
- English
- Spanish
- Korean

---Things you should know---
• App developer doesn't participate in the purchase and download process, if you have problems with credit card authorization, charge, double charge, download failures, we have no way to help you, you'll need to check the Google technical help forum.

• Update is always free, Google controls charging and it WILL NOT charge for update.
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307 total

What's New

Change Log:

v1.6.1 Update
– Updated Database entries
– Fixed Error with M5 clearance hole (bad conversion)
– Fixed Disclaimer show crash
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Additional Information

Eligible for Family Library
January 29, 2018
Current Version
Requires Android
2.2 and up
Content Rating
Offered By
7956 VAUGHN RD BOX 170 MONTGOMERY, AL 36116-6625
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