Florence mail box
#1
04-27-20, 05:30 PM
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
Geo
#4
04-28-20, 06:53 AM
Group Moderator
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.
#5
04-28-20, 07:04 AM
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 can’t 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, can’t get it off no matter how much force I use, may try a little heat but will junk everything and go to Galvanize.
Geo
Geo
#6
04-28-20, 07:07 AM
Member
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..
