The Stovebolt Site Forums The Parking Lot Panels 'N Burbs Lower rear corner patch

The nails that hold the 47-55 panel-body wood blocks to plates on the chassis are spiral wood nails. Here are a few extracts about spiral nails:

"Spiral nails have a spiral line down the shank, somewhat like the threads of a screw. These nails are used for securing hardwood flooring, attaching siding, and building rafters. They have great holding power, and are very squeak-free.

Spiral nails turn like screws and hold tighter than regular nails."

Here are galvanized spiral nails.

Here are stainless spiral nails.

McMaster-Carr also has two types of spiral nails, galvanized/stainless/etc (search on spiral nail}