Mechanical Engineering Toolkit

Apr 8, 2026

New in 1.7.0:

• Drill & tap chart — search any thread for its tap drill and clearance drill size.
• ISO 286 fits & tolerances table — look up hole and shaft limits by diameter and fit.
• Choose your app language from the side menu.
• Now available in German, French, and Japanese.
• Fixed a problem that stopped the app installing on many Android devices.