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:
Transmission Mount Flange
Product Details
Brand: Welder Series
MPN: 35004
Country/Region of Manufacture: Canada
Thickness: 3/16"
Hole size: 7/16"
Designed for 1-1/2" tube, but can be modified to fit slightly larger diameter tubing. 3/16" pickled & oiled mild steel.
3-¾” x 1-3/8″ with 2 holes, 7/16″ dia on 2-¾” centers.
