72 horn relay nut

[Ken C.]

Does anyone have a photo of the nut(s) that mount the horn relay to inner fender. In the AIM UPC 12 A8 shows part #3876130. Mine looks to be mounted with a rubber washer and a nut with rubber on it. AIM not showing any type of washer and nut looks diff. Thanks in advance

[Ed D.]

Re: 72 horn relay nut

horn relay 002.jpg

Here is the original horn relay on my 72. The nut is a self locking nut
Ed

[Rich C.]

Re: 72 horn relay nut

I think he's referring to the two screws that actually mount the relay to inner wheel well. The two bolts thread into rubber (with a metal threaded insert) "well nuts". As the mounting screw is tightened into these, the rubber portion expands gripping the hole in fiberglass. At least on 72-73's


1973 LS-4 454 coupe owned 24 years
1996 LT-4 CE coupe
Victory Hop Devil Ale- currently on tap!

[Ken C.]

Re: 72 horn relay nut

Yes Rich, looking for what the well nuts look like.

[Joe L.]

Re: 72 horn relay nut

Yes Rich, looking for what the well nuts look like.

Ken------


The GM #3876130 is a rubber well nut with a brass insert. It was widely used for horn relay and voltage regulator attachment. It's discontinued but there are many for sale on eBay.

[Rich C.]

Re: 72 horn relay nut

Paragon shows a good picture of the well nuts on their site.

[Ken C.]

Re: 72 horn relay nut

Thanks all, i guess mine are original but over the years have turned into a grommet style washer and the nut, making it a 2 piece. found some nos ones on Ebay. Thanks Joe and Rich