Converting ANSI to NAS Bolt Specifications: Advice Needed

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SUMMARY

This discussion focuses on the conversion of ANSI bolt specifications to NAS (National Aerospace Standards) specifications, particularly for aircraft bolts. The user emphasizes the importance of consulting the actual NAS specifications rather than relying on outdated online resources. They highlight the challenge of finding equivalent NAS fasteners for specific ANSI hole callouts, despite having the necessary thread counts and diameters. The conversation underscores the complexity of NAS specifications, which encompass a wide range of fasteners.

PREREQUISITES
  • Understanding of ANSI bolt specifications
  • Familiarity with NAS bolt standards
  • Knowledge of aircraft fasteners
  • Ability to interpret technical specifications
NEXT STEPS
  • Research NAS 1103 specifications for aircraft bolts
  • Obtain the official NAS specification documents
  • Explore conversion charts between ANSI and NAS fasteners
  • Learn about the different types of fasteners covered by NAS standards
USEFUL FOR

Aerospace engineers, mechanical engineers, procurement specialists, and anyone involved in the specification and selection of aircraft fasteners will benefit from this discussion.

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that you get a hold of the actual spec, not a web site's pared down version that could be who knows how many revisions out of date.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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