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:
Sway Bar Outer Tube
Product Details
Brand: Welder Series
MPN: 227362
Diameter: 1-3/8"
Length: 34" or 44"
1-3/8" OD x 11 ga. Available in two lengths.
34″ long for 36″ sway bar kit.
43″ long for 45″ sway bar kit.
1-5/8" OD x .188" wall tube is 43" long.