BNC.

BNC are a smaller (no longer classifiable as miniature) locking connector that will support frequencies up to the middle radio ranges. They are about as small as you can go while still retaining a durability factor, as a result they are very common front panel connectors on equipment built after the solid state miniaturization syndrome.

Benefits:
Common.
Inexpensive.

Drawbacks:
Plugs are rarely designed to be assembled without a crimper, making these difficult to repair.
No native jack switching to allow normalization.
Panel mount jack is vulnerable to impact.

As shown, the BNC system (far right) has a scaled down mounting plate making format change to UHF difficult.

The panel hole for mounting these is an acceptable size for phone (instrument) plugs, so long as you can live with a few extra holes.

The protruding nature of the BNC recepticle makes it a natural at collecting grime and proves it vulnerable to impact damage.