Vintage Air with a 4 inch recessed fire wall?

[NickP]

I learned of their existence from a heavy truck mechanic 25 years ago, they work great when replacing a wood trailer floor.

Several types to fit the need.

https://www.mcmaster.com/#elevator-bolts/=1damrwq

Carbon Steel Stainless too Special for wood or Belting

[chevynut]

This is what I used. I just plug-welded them in from the front of the firewall. Got them at a local ACE Hardware.

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[markm]

If I need one or two Ace is an option, but Fastenal is a must for quantities.

[Rick_L]

Lowes has them too, apparently they are more widely available than one might think. I find McMaster-Carr to be more price friendly than Fastenal, and I get the stuff by UPS ground in 2 days.

[Bluegrass Trifive]

Lowes has them too, apparently they are more widely available than one might think. I find McMaster-Carr to be more price friendly than Fastenal, and I get the stuff by UPS ground in 2 days.

Yep, I’ve bought them from my local Lowes several times.