I take it this is a threaded joint?
What are you putting together?
Yes, threaded fittings. Everything else we don in solvent weld as far as possible.
The equipment itself is mostly pool filters/pumps. Which are normally all done with solvent weld. But we have to make the kit modular, mobile and very tough, so we often go onto stainless/brass fittings. We use composite bulkheads to go from one to the other unless we have no choice but to directly mate metal and plastic threads..