Welcome to the Fastener Resource Center. Our Experts have built this site as a central resource by and for the industrial fastener industry and the related supply chains.

Here you’ll find expert advice, technical specifications for industrial fasteners and our “Ask The Experts ” page, where we answer questions and even recount problems we’ve solved for our partners.

The information contained on these pages has been gathered from numerous sources from the Internet and other industry sources and is provided to you free of charge for reference purposes only. For specific advice, please consult a certified engineer.

Feel free to ask a question, leave a comment and interact!


The Fastener Resource Center Team

4 Responses to Home

  1. Justin Burns says:

    Hello I’m in the Mechanical Engineering program at Forsyth Technical CC. I have a multi-screw head and square thread presentation and was trying to find any and all information on the following:

    1) Clutch type A screw head
    2) Multi-spline or Bristol screw head
    3) Slab Head screw/bolt head
    4) Phillips screw head
    5) Square threads

    Mainly I’m looking for pictures/history/ process of manufacturing/ purpose of each/ etc.

    Any help would be greatly appreciated.

    Justin Burns

    • Expert says:

      Hello Justin,

      It would appear to me that what you are looking for is information on fastener drive systems. Whereas we here at Fastener Experts are good at solving particular challenges that fastener users have (i.e. what platings to use in specific environments; what fasteners to consider for a particular assembly requirement), your question is best answered by existing resources already on the Internet.

      Let me help you get started:

      A great overview of fasteners in general can be found at this Wikipedia page: http://en.wikipedia.org/wiki/Screw.

      An excellent list of fastener drive types can be found at this Wikipedia page: http://en.wikipedia.org/wiki/List_of_screw_drives. On this page, I am seeing the drives you are looking into: Clutch, multi-Spline/Bristol, Phillips and Square. The only one missing seems to be the “Slab Head” and to be honest, I haven’t yet come across this one in 30 years in this field. However, this page seems to have an entry for a Slab Head and wouldn’t you know it, it looks just like it sounds: http://allied1.com/harper.htm.

      Basically, between Google and Wikipedia, you’ll be able to find everything you need. If you need illustrations, you can find those on the Aspen Fasteners site.

      Good luck with your studies over at Forsyth Technical (in North Carolina, right? Yeah, I googled your school!) and let us know if there is anything else that we can help you with.

  2. Svenstrom says:

    What would be the force needed to shear a 5/16-18 diameter 18-8 stainless steel bolt?

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