When we ran a full service chassis fab/turn-key hot rod shop a number of years ago, it was always useful to have threaded things around to weld into the frame for some kind of mount, etc.
Here’s a list of all our threaded things for your reference:
Air Spring Mounting Plate
Product Details
Brand: Welder Series
MPN: 474209A
Country/Region of Manufacture: Canada
Thickness: 3/16"
Hole size: 3/16"
Mounts many rear air springs.
5” wide x 5-½” from the flat side to the farthest part of the radiused edge. The 3/8” center hole will mount Firestone F7012, F7076, or F9000 tapered sleeve air springs. Also used with #474206 rear axle bracket plates.
