drain in a plastic tub
 

I need to make a drain in a plastic tub for ebb&flow what hardware can I use that is cheap? Any Ideas?

I use a threaded 1/2 inch male PVC end stuck through a half inch hole with a sliced end piece of a 1/2 inch female threaded
connector or a gray round type plastic 1/2 nut found in the electric department.
Here is one way of doing it.
Add plenty of Teflon tape to the threads to prevent leaks.
Ron