On Mon, 11 May 2015 20:23:08 +0800, 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.

I can't tell you what to use, but I can tell you what NOT to use --
Loctite. It attacks most thermoplastics.

--
Ed Huntress