Thread Calculator

The app includes:
- A calculator for thread cutting for the following units: M, MF, UNC, UNEF, UNF, UNR, UNS, NPT, NPTF, NPSC, NPSF, NPSL, NPSM, BA, BSP, BSF, BSW, BSPP, TR, and TRF
- A calculator for cold forming
- A calculator for thread repair

You want to know which tap hole you should drill for threading or which bolt you should use?
With this app, you will find the desired measures in no time:
Simply select the desired thread type, nominal size, and pitch and you will get the matching diameter for your project. This saves precious time you would have spent tediously searching for internal and external thread dimensions in tables.
As this app is still in its development phase, new features will follow soon, so stay tuned!

GSR Gustav Stursberg GmbH is a manufacturer for high-quality thread cutting tools with 130 years of operational experience in the area of threading tool production. The product portfolio includes a wide selection of tools for different areas of application. GSR taps, twist drills, round dies, and tool holders are manufactured to the highest quality standards in our own production facilities. The constant quality control during the production process guarantees a consistent good quality in all national as well as international production facilities.
This requires enormous precision, which is reflected by our tools.

Precision is in the details. Since 1889. Show More