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Old 06-07-2023, 09:13 PM   #8
tubman
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Join Date: Dec 2013
Location: Minnesota, Florida Keys
Posts: 11,633
Default Re: Wing nut thread size '51 ford air cleaner

I dug out the orignal air cleaner for my '51 today. The top nut is definitely 1/4-20. It is a stamped wing nut with traces of bronze paint that was used on the engine. It was greasy and dirty so I left it to soak overnight. I can post a picture of it if you need to see it.
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