Most threadlockers and pipe dopes specifically warn against use on
thermoplastics (like PVC) and will eventually cause cracking. Gasoila has
one pipe sealant product that is rated for use on plastics
(www.mscdirect.com if you can't get it locally and to find the part # :-)),
you could use that if you can't find a better threadlocker that is safe. We
used a lot of it on plastic and mixed plastic-stainless steel NPT fittings,
and while it doesn't set up rock hard I think it would be better than bare
threads.

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Regards,
Carl Ijames carl.ijames aat deletethis verizon dott net

"snafu" wrote in message
...

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.