I recently encountered as special nut or nut-like fastener and it is just the thing for a particular application where a bolted connection needs to be cinched up once and provide a connection that can't be disassembled.
The joint I observed used a 3/4" unc bolt that appeared to be nothing out of the ordinary. But the nut was a conical affair that is either crimped on or pressed on in a way that the threads of the nut are damaged during the pressing process such that the nut can't be removed. The appearance of the device suggests that is pressed on rather than crimped, but is in a tight spot where I can't see.
I saw them used in a hinged connection on a floating boat dock, where the bolt served as the pin in the hinge between dock sections. The attractive part of the conical non-removable nut was that it discourages fun loving local teenagers from disassembling the dock and sailing away on the disconnected sections. Indeed I have been asked to make repairs to the dock after just such an attempt was foiled by these handy devices and the miscreants decided to vandalize the dock as a way of teaching it a lesson. I need to take the dock apart but would like to reassemble it with these handy gadgets.
I assumed it was made by Huck fasteners because it appeared to be distantly related to a Huck bolt other than it was not as heavy duty and could be installed in tight quarters where a Huck gun could not go.
Any suggestions on where I could find this would be appreciated. I tried Fastenal, but they do not list this device.
Jon Juhlin