That link didn't work, but is this the one you meant to publish?

http://www.pasternack.com/pdf/catalo...Identifier.pdf

73
John VK2KC

Anyone know what type of connector this is ?

Two suggestions come to mind. First, have you tried Pasternack's
connector identifier PDF (www.pasternack.com/pdf/catalog/
ConnectorIdentifier.pdf) or equivalent? Second, could it be a damaged
BNC-to-N? It seems strange to have the pin sticking out that far; it
would be inviting damage to the pin.

Cheers,
Tom