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:
Tube, 1" OD x ¾" ID x 2-¼" Long
Product Details
Brand: Welder Series
MPN: 20952
Diameter: 1"
Length: 2-1/4"
Hole size: 3/4" ID
Designed for 2-¼" shackles with ¾" diameter bushings.