What's New

Version 1.2 includes:
- Increased performance (lower memory usage)
- New home screen layout and info section
- New artwork

Fractional Inch and No./Letter Drill sizes coming soon in the next update.

App Description

***** Note: This app does not give drill sizes in Inch or US No./Letter. This will be added soon in version 1.3. The current version shows drills in metric only. *****
This app contains an easy-to-use set of charts for drilling and tapping. No typing required, just tap the required thread type, and scroll through the chart to find your size.

Recommended drill hole diameters are in metric units. Drill sizes are for between 65% – 75% approximate depth of thread, based on the nominal size minus pitch formula for cutting operations. A variety of common thread types are included:
- UNC (Unified Coarse – the US Standard thread type)
- UNF (Unified Fine – the US Standard type for fine threads)
- ISO Metric
- ISO Metric Fine
- BSP (British Standard Pipe thread type)

A helpful reference tool for Engineers, Students, Tool Makers, and Tradesmen.

If you find this app useful, please leave a review.

If you have suggestions, requests, or support questions, feel free to contact us through the support link below, or through our website.

App Changes

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