Florence mail box

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Old 04-27-20, 05:30 PM
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Florence mail box

Hi All, we just installed some pedestal mail boxes, there are 3/8 X 16 carriage bolts that hold the boxes to the pedestal, the nuts look like standard SS nuts, however once the nuts are tightened down they can not be loosened , not all nuts are like these, has anyone had an experience like this, are these some type of security nut?
Geo
 
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Old 04-27-20, 05:35 PM
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Are you talking about locknuts?
 
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Old 04-27-20, 05:41 PM
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No, it looks like a standard 3/8Ē nut.
Geo
 
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Old 04-28-20, 06:53 AM
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There are several different types of lock nuts. Nyloc are easy to spot but distorted ones can look very similar to a standard nut. Look for divots pressed into the flat sides of the nut. The threads are purposefully made slightly "off" so there is always resistance on the threads to hold it in place.

 
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Old 04-28-20, 07:04 AM
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I have done all that , this a standard nut, I just sign in to another forum and apparently SS is a very difficult material to deal with as far as threads go, I canít believe I was just running the nut up the bolt to check for threads , it was a bit stiff so I put a wrench on it and gave it a couple of turns and that was it, canít get it off no matter how much force I use, may try a little heat but will junk everything and go to Galvanize.
Geo
 
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Old 04-28-20, 07:07 AM
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The threads on some stainless hardware can be "stretched" to the point it is almost impossible to remove the nut. I think the most likely cause was installers "gorilla torquing" them..
 
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Old 04-28-20, 07:22 AM
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No Gorilla force here, just enough to turn the nut a bit.
Geo
 
 

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