Yes thats what i want them for.Yes I use them in 3D prints if I need a removable item/section. I use the split ones which expand slightly when the bolt is screwed in.
Whats a straight Knurl?3/8 bsf? The favourite thread on fishing gear, lol.
Brass knurls beautifully. If you want press in inserts you need a straight knurl as a diamond knurl tends to broach the hole as you press it in. Good for mold in applications only.