Bolt & Thread Calculators contains the following calculators.

Bolt/Pin in Single Shear
Bolt/Pin in Double Shear
Thread Shear Area (ISO 898)
External Thread Shear Area
Internal Thread Shear Area
Thread Tensile Stress Area
Thread Tensile Stress Area (for more than 100,000 psi material)
Thread Tensile Stress Area (for less than 100,000 psi material)
Minimum Thread Engagement
Minimum Thread Engagement (ISO)
Fastener/Thread Pitch Circle
Fastener/Thread Ratio and Length
Torque Wrench Adapter - Reduced Arm Calculator
Torque Wrench Adapter - Extended Arm Calculator
Axial Clamp Force
Thread Yield & Tensile Strength
Self Tapping Screw Pull-Out and Torque
Screw Work Gear Axial Force

Please send us any comments, suggestions or questions through our website.

What’s New

Version 2.8

- Build with iOS SDK 13.0
- Added LaunchScreen storyboard
- Increased usability of the app

Ratings and Reviews

1.0 out of 5
1 Rating

1 Rating

Ld hstn ,

Not user friendly

No graphics, very basic. Overpriced for what you get. Rather pay $1 than $5

App Privacy

The developer, FPC Ltd., has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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