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-   -   Ever seen a bolt like this? (https://67-72chevytrucks.com/vboard/showthread.php?t=699654)

mancad 03-02-2016 06:06 PM

Ever seen a bolt like this?
 
1 Attachment(s)
This came out of a 1968 C20 4spd transmission side cover. The threads would not come clean with a wire brush so I got a small screw driver and picked it clean. The residue in this area was brown/black, fairly tough, and fibrous. When cleaned, it showed this notch machined into the threads. All 12 bolts were the same. I'm guessing they pressed in a piece of plastic or fiber to keep the bolt from loosening; maybe it helped seal the hole as well. I've not run across this before. It must have been a fairly expensive solution.

rcazwillis 03-02-2016 06:23 PM

Re: Ever seen a bolt like this?
 
Appears to be some sort of lock bolt like a nylon lock nut. Never seen one before.

kwmech 03-02-2016 06:49 PM

Re: Ever seen a bolt like this?
 
I haven't seen any of those for years, so yes I've seen them before

indymachinist 03-02-2016 06:56 PM

Re: Ever seen a bolt like this?
 
They still make bolts like that although they aren't that common.


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