What's the thread size for UHF connectors? as in PL-259 / SO-239 I want to thread a grounding plate which will save me one fitting and give more contact area. I think (guess) it's 1/2-18, 1/2-20, or there abouts. 73, Roger (K8RI) --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus