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:
Wheel Spacer; 5 on 4-1/2 x 1/4”
Product Details
Brand: Welder Series
MPN: 990296
Country/Region of Manufacture: Canada
Thickness: 1/4"
Bolt Size: 1/2"
Laser cut from 1/4" thick mild steel. 10 available.