Technical Questions About Fasteners

Our knowledge of the industry standards, fastener technology, and fastener materials ensures an accurate and timely response to virtually any fastener related question.

Most fasteners are made to comply with one or more standards. The Fastenal Engineering & Design Support group are members of ASTM, ASME, and ISO and are actively involved in the development of standards. Some of the many organizations that write fastener standards are:

Standards are absolutely necessary -- otherwise, you'd never know what sort of performance to expect from a fastener -- but realistically, most end users won't be able to understand all of the specifics of these standards.

The Fastenal Engineering & Design Support group is familiar with the standards that cover the fasteners we sell. We can translate them into a language anyone can understand, whether you're a design engineer for an OEM or a maintenance worker at a plant. We're also adept at deriving necessary information that's needed in industry but not addressed in the fastener standards -- Concepts like installation torque, re-use of fasteners, life expectancy of plated or coated fasteners.

Can't Find the Answers? Ask the Fastenal Engineering & Design Support team

Through the various links here on the Fastenal Engineering & Design Support site, you should be able to find the answers to most questions about fastener standards. But considering that the Industrial Fasteners Institute (IFI) book (the "Bible" of fastener standards) weighs over 7 pounds, it's impossible to preemptively address all potential standard-related questions.

We're here to help you make sure you have the correct product for your application. Contact us at

Additional Resources

  • Engineering Glossary - Common terms used in the industry and Fastenal Engineering & Design Support documents.
  • FAQs - When it comes to safe, effective fastener usage, there's no such thing as a dumb question.
  • Torque Calculator - Recommended inch series torque calculator. Plug in your fastener data and find out what torque Fastenal Engineering & Design Support recommends.
  • Load Calculator - Tensile, yield, proof and shear -- all calculated from the fastener dimensions you provide.
  • Mechanical Properties of Inch Fasteners - Cross reference the standards to the key mechanical properties required of those fasteners for inch series fasteners.
  • Mechanical Properties of Metric Fasteners - Cross reference the different classes to their key mechanical properties for metric series fasteners.