Fender Extension Studs - Chevelle Tech
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post #1 of 5 (permalink) Old Oct 5th, 19, 7:09 PM Thread Starter
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Fender Extension Studs

The studs on my extensions have gotten pretty misshapen over the years to the point in which they can't grip tight onto the fender anymore, which is pretty annoying now. These kind of studs use from what I was able to find is called "thread-cutting nuts", which was just a thin nut that cuts the stud to form a thread. Anyway, I was thinking about cutting those studs off and replacing with a new option, but I just wanted to hear some opinions first. The part that worries me is that the extensions are a softer pot metal, so are these durable enough to drill and tap? I don't want to crack them. If they won't really crack, I can just use a simple bolt. However, I was also thinking in order to reduce the chances of it cracking over time of being removed and installed, maybe I can get a double-sided bolt stud to insert on the extension side as a permanent stud, and then just get a speed nut to secure it to the fender?
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post #2 of 5 (permalink) Old Oct 5th, 19, 7:36 PM
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I actually just threaded the posts you mentioned and installed lock nuts with washers.

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post #3 of 5 (permalink) Old Oct 5th, 19, 8:43 PM
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Re: Fender Extension Studs

I assume this would be similar to the rear extension on a 66. I repaired a couple broken studs by cutting them flush and then drilling and tapping. The amount of caution needed to stay centered on the boss when drilling and even more caution when tapping these fragile parts is extreme. this was all done by hand.


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post #4 of 5 (permalink) Old Oct 5th, 19, 11:24 PM
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Re: Fender Extension Studs

Years ago, one of the studs which hold the rear taillight extensions on my '69 Malibu broke. I drilled a hole in it's place, screwed in a piece of 1/4" threaded rod secured with some "lock-tite" and this made a new stud onto which I could now use a regular 1/4" nut. Problem solved.

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post #5 of 5 (permalink) Old Oct 6th, 19, 11:01 AM
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Re: Fender Extension Studs

Working on a 71 El Camino with front extensions that were wood screwed to the fender. Half the
original studs were stripped or broken. Cut them all flush and drilled and tapped for valve cover studs.
Epoxied them in and problem solved.
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