Calculate tightening torque and preload for hex head and socket head screws.
The calculation considers friction scatter, tool accuracy and scatter on preload.

Based on VDI 2230:2014

Bossard calculators and converters are designed for engineers, technicians, designers and students involved in the development and assembly of bolted joints. 

 

Please log in to use this calculator. If you do not have an account, register here

Screw type
Clearance hole - ISO 273
Mechanical properties of material, thread size and friction
Property class of screw




Tool precision
Data used in calculation
Login N/mm²
Login mm
Login mm
Login mm
Login mm
Login mm
Login mm²
Results
Login Nm
Login kN
Login kN
Login kN
Login kN
Login %

Verify your calculation, maximize potential of your product.

Bossard Expert Eduation
Could you or your engineering team use a refresher course on fastening technology? Visit Bossard Expert Education for available engineering seminars to consider!

Learn more

Bossard Expert Test Services
Want to verify your products are meeting quality standards? Test in one of our 14 certified testing laboratories worldwide (3 with a ISO/IEC 17025 certification).

Learn more

For the purpose of providing services, this website uses cookies. You will consent to this by clicking on “OK” and/or using our services.
Please click on privacy policy to find the information on cookies and the possibilities for modifying the terms of their storage.