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:
Jam Nuts, various threads
Product Details
MPN: NJ-63
Thread: Various
3/8-24, 9/16-18, 5/8-18, 11/16-18, 3/4-16. Grade 5, zinc plated. From 3/8-24 to 3/4-16. Please see options on the right.
Please see related products for Nylok nuts.