Hi all....
The MB connector is a reverse gender connector. The panel mounted one usually has a male pin in the center while the cable mounted one has a female pin with a long teflon insulator around it. I would bet that NO BNC connector of any stripe will mate.
Amphenl made adapters for these. You probably can look them up or find them around:
33200 BNC Jack to MB Jack - Panel Mount - 4 hole flange
37200 BNC Jack to MB Jack - Panel Mount - 1 hole 'D'
47250 BNC Jack to MB Plug - Not mounted - This the one I needed as it makes an MB connector on the panel into a BNC Female with a snap on adapter
47275 BNC Plug to MB Jack - Not mounted - Would be good to take an MB cable and make it into BNC ends with an adapter.
Hope this helps
Dan in Chandler, AZ