Re: Unsure what these are called

Dave G8KHU

Hi Mike
Further to John's reply the flange in your picture is choked (deep groove inside the O ring) ands should be mated to a plain flange.
The guide does look to be WG16 (aka WR90 / R100), if so the inside dimensions of the guide are 0.9" x 0.4" and O/D will be 1" x 1/2".
I can't help you with rings I'm afraid, but I can let you have a couple of WG16 plain round flanges with pleasure. Send me your address off relector and I'll post them to you.

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