Converting ANSI to NAS Bolt Specifications: Advice Needed

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Discussion Overview

The discussion revolves around the challenge of converting bolt specifications from ANSI to NAS standards. Participants are seeking advice on how to identify the correct NAS bolt sizes based on existing ANSI dimensions and specifications.

Discussion Character

  • Technical explanation, Debate/contested, Conceptual clarification

Main Points Raised

  • One participant expresses the need for assistance in converting ANSI specifications to NAS standards, indicating a lack of resources for determining the correct bolt sizes.
  • Another participant shares a link to a website that may provide relevant data on NAS aircraft bolts, suggesting it could be helpful.
  • A third participant acknowledges the usefulness of the shared link, indicating it contains the necessary data.
  • One participant advises obtaining the actual NAS specification documents rather than relying on potentially outdated web resources, emphasizing the variety of fasteners covered by NAS standards.
  • A participant highlights the difficulty in finding a direct comparison between ANSI hole callouts and NAS fasteners, noting the absence of a conversion chart despite having the necessary specifications.

Areas of Agreement / Disagreement

Participants generally agree on the importance of using accurate specifications but express differing views on the availability and reliability of resources for converting ANSI to NAS standards. The discussion remains unresolved regarding the best approach to find the necessary conversions.

Contextual Notes

Limitations include the potential for outdated information on websites and the lack of a comprehensive conversion chart between ANSI and NAS specifications.

bigaggie
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I need to spec out some bolts according to the NAS standard. The problem is that I only have the dimensions/specifications in ANSI format. Has anyone ever worked with NAS before? I can't find anything to help me figure out what size bolt I need.
 
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Maybe this will help.

http://www.bonaero.com/BABolts.htm#NAS1103

They are aircraft bolts.
 
Yes, that is exactly the data I was looking for. Thanks a million!
 
I would highly recommend that if you are really spec'ing out any kind of NAS bolts that you get a hold of the actual spec, not a web site's pared down version that could be who knows how many revisions out of date. There are MANY types of fasteners covered by NAS specs.
 
Well, thus far the problem has been finding the comparable to NAS fastener to an ANSI hole call out. I have the call outs, I know the thread counts, diameters, etc, that I need. The problem is I couldn't find anywhere that would tell me what they were. They only list NAS 144-158, etc. No conversion chart or anything.
 

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