WhatsBolt app for iPhone and iPad

Ever wondered which metric bolt you should use for your acting forces?

WhatsBolt will help you!

This app roughly estimates the metric bolt diameter* in a bolted joint according to guideline VDI2230-Part1.
The app is applicable for bolt dimensions range from M3 to M39 and strength grades from 8.8, 10.9 and 12.9.
Simply fill in the required fields and you will get a estimated diameter* for your bolt joint.







*as this is a estimated diameter a detailed calculation of the bolt joint according VDI2230 shall be done afterwards, which is not part of this app. The app developer takes no responsibility for the calculated bolt joints.