There are a lot of different types of snap-and-seal RG-6 plugs. The PDF that John references helps show that. Can we see a photo of your connectors? 73, Mike www.w0btu.com On Sat, Sep 7, 2013 at 8:30 AM, Clive GM3POI <gm3poi2 at btinternet.com> wrote: > Hi Guys, I have been delivered some Snap and Seal RG6 plugs that also > include a single O ring. > >