Today I released ThreadPal 2.0. It adds some important features and is even easier to use than the previous version.
Features include:
- Detailed Data for Thirty-Nine Thread Types * Calculations for Special Diameters and Pitches * Measurement Over Wire (MOW) Calculations for Alternate Wire Sizes * Enhanced Handling of Metric Fits and Tolerances * Multiple-Start Calculations * Coating Calculations * Length of Engagement Calculations * Lead Angle Calculations * Percent Thread Calculations * Interactive Tap Drill Chart for Cut and Form Taps * Informative Popups * Inch or Metric Display * Detailed Report for Viewing or Printing * Illustrated User Guide * Free Email and Telephone Support
Typing is required only when you need to enter the major diameter and pitch of a new thread, or edit an existing input. There's never any "starting from scratch" just to change one value.
ThreadPal takes the mystery out of interpreting and calculating metric fits and tolerances. The next time you run into something like an "M27 x
1-5h6h", a couple of mouse clicks will give you detailed manufacturing information.
Enter the maximum and minimum coating buildup you expect and ThreadPal will calculate your pre-coat machining diameters. Plating tolerances can have a surprising impact on machining tolerances. You can also factor in modified post-coat dimensions for special cases.
Calculations are based on data and formulas taken from national and international standards, military specifications, and industry-standard references. Everything is carefully checked and documented.
More information can be found at