On Monday, May 11, 2015 at 8:23:10 AM UTC-4, snafu wrote:
I have a 1/2" x 20 UNF bayonet style electrical connector threaded into PVC.

The PVC is the standard gray material bought as a round bar off the shelf.

Mechanical constraints prevent using a locking nut or radial set screw
for retention.

Does anyone have any suggestions as to what chemical means might be
useful to lock or bond the (probably stainless) metal connector to the
PVC to prevent unscrewing?

Thanks.

Chemical Bond: there is an adhesive for bonding ceramic 2 part delivery
injection type doser mixes the proper amount as it comes out.

The grit s will jam if it unscrews - thus locked.
or put sand in the threads. Glass beads etc.

Idea? groove , wet grit, assemble, let dry, slam down,
grit release, jams threads.

Eh?