CFR Firewall Shifter Bushing, Fasteners Options

[TargaToy]

I'm installing Chris Foley's firewall bushing which is a beautiful design.

Has anybody installed one using fasteners other than the sheet metal screws or pop rivets that came with the kit?

I've been contemplating installing #10-24 riv-nuts after reading someone else's experience with either the screws or the rivets (I can't remember which) working loose over time.

What's your experience?

[technicalninja]

All other forms of attachment rely on the firewall retaining the fastener.

A bolt through plate, like TargaToy built does not. When you tighten his down it pinches a 360 degree circle around the hole.

Sooner or later the Rivnut insert will loosen in its mounting just like the rivets or sheet metal screws

Sometimes you end up with a Rivnut spinning in the surface it's mounted in and that can RUIN your day, especially if you can't get to the backside to grab the Rivnut.

The Rivnuts will also stand the bushing off of the firewall surface the thickness of the outer portion of the Rivnut. This is enough to make me use a tiny bit of RTV between the bushing and firewall if I was installing using Rivnuts.

The Rivnuts require a larger hole and the metal between the original hole and the Rivnut holes might get pretty thin.

I was planning on simple pop rivets for mine until I saw TargaToy's solution.

Now, this thing we're talking about is NOT all that critical in how it's mounted.
It sees no real side loading and the original pop rivet design is not only easy, but also sufficient for most installations.

Want to go "full monte"?

Stick studs into the plate...

Studs would make that more user friendly to install by one person and I'd choose "nylocks" for the nuts.

Those button headed Allens do look great however!

Thanks again to @TargaToy

Sometimes "seeing" a problem through the eyes of others HELPS bigtime!