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:
Frame Tab
Product Details
Brand: Welder Series
MPN: 18214
Country/Region of Manufacture: Canada
Thickness: 3/16"
Hole size: 1/2"
Buy 10 of one part number, get 10% off.
Buy 40+ to get them for 40% off! Sorry, no additional discounts applicable.
The center of the 1/2" hole is 9/16" from the opposite edge. 3/16" steel.
Longest edge is 2-3/8″.