Not only different nut types, but the bolt combinations are many as well. If you’re looking for tightening up tolerances in looser holes, higher grip/tensile strength than AN hardware can provide, etc, don’t overlook the NAS and MS series bolts, screws, etc. Do your research and pay attention to grips and thread lengths. They are NOT the same as AN in dash number, the threads can be longer or shorter (usually shorter) but can provide you with options you wouldn’t otherwise have for increased strength, serviceability, and hardware accuracy issues.
I highly recommend a shop copy of the GENUINE AIRCRAFT HARDWARE book.
A cruise through their website is always good too. Great reference and maintenance resource.
Sent from my iPhone using SuperCub.Org