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Bolt Science Info & FAQ

Bolt Science's web page has the links shown below (Bolt Science is not affiliated with FAST-DAQ or SureBolt). All credit for this information should go to Bolt Science. Bolt Science has the best bolted joint tutorial on the web. See the links below.


After all the mechanical engineering classes on stress analysis calculations, why do some bolted joints fail? Here is Bolt Science's bolted joint information page. As you browse their site, notice the problems caused by variations in bolt tension. SureBolt helps you avoid such variations in tension. See animation. What are the sources of torque wrench tension errors?

For more information, see the main SureBoltTM navigation screen.


Information related to Bolted Joint Technology

Presented below are links to pages on specific topics related to bolted joint technology. We specialize in this subject and have extensive knowledge and experience on the solution of problems related to bolted joints. Please send us an Email (BoltScience) if you require assistance on a problem that you are experiencing. Click on appropriate link for further information on the subject.


Glossary of fastener and related terms 

Methods of Tightening Bolts 

Bolt Tightening and Quality Control 

Case Study - Torque Tightening 

Vibration Loosening of Bolts 

Strength of Threaded Fasteners 

Bolted Joints containing Gaskets 

Frequently Asked Questions 

The Importance of Preload - The Joint Decompression Point 

Bolt Crosstalk and the need for a Tightening Sequence 

Tutorial on the theory of Bolted Joints
Why is preload important - why bolt's clamp force vital?
How a bolted joint sustains an applied force
What is a Joint Diagram?
Joint Diagram with an external force applied
The effect of a high external force on a joint
The effect of a compressive external force on a joint
The Effect of Joint Deformation loss due to Embedding
Bolt Preload Variation due to the Tightening Method

Information related to screw threads
Historical background to screw threads
Basic Thread Terminology
The Whitworth Thread Form
The British Association Thread Form
The Unified and Metric Thread Forms
Basic Profile of Unified and Metric Thread Forms
Tolerancing of Screw Threads

Examples of bolt failures
M24 Engine Mounting Bolt Failure 
M16 Bolt Failure 
M12 Bolt Fretting Failure 
Wheel Stud Failures 


Contributed Articles
Talking about Torque by George Lorimer  Register for our newsletter

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All Trademarks are acknowledged.
Bolt Science - Specialists in Bolted Joint Technology
Copyright 2000 Bolt Science. All rights reserved.
BoltCalc is a registered trademark of Bolt Science Limited.
Torque and Fastener are Trade Marks of Bolt Science Limited.

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