Re: Rust proofing after cutting threads
Yes. Lanolin is good. One brand name to look for is Fluid Film.
Originally Posted by robm
The thickness of a coating such as galvanizing or plating (zinc plating is useless) will change the pitch diameter by 4 times the coating thickness. So if the galvanize is .002 inch thick the pitch diameter changes by .008 or a lot more because it will tend to build up in the threads. That is why all of the advice about threading. The threads are cut at a 60 degree angle, the math works out to 4x.
I would look for a good rust inhibiting epoxy primer and install the nuts on wet primer. Then apply the cold galvanizing after the primer dries. They aren't coming off easily, so this isn't for something that will need adjustment.
Wizbang's advice is simpler, and good as long as you can live with encapsulated bolts.
Edit: What are you bolting up?
Last edited by MN Dave; 04-06-2017 at 11:59 AM.
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