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:
Spacer, 3/4" OD x 7/16" ID x 1/4" long
Product Details
Brand: Welder Series
Thickness: 3/16"
CNC machined spacer, 3.4" OD x 7/16" ID x 1/4" long.
Buy 10, get 10% off.