https://lh3.googleusercontent.com/-R...November272012

I need to secure a spring to an object with a bolt sticking out
of it. It will undergo rotational torque.

I have acquired a nut that fits the bolt.

I could use a spring with a washer welded to each end. Is there a
way to accomplish that without welding?

I could use some terminology, if I end up buying something online.
If that part exists, what are they called?

Thanks.