The interface specifications for the SMC and many other connectors are referenced in MIL-STD-348.

[1] They use a #10-32 UNF threaded interface (a screw type).

They offer electrical performance from direct current (DC) to 4 GHz.

The contact dimensions are identical to the snap-fit SMB.

The term Subvis connector appears to be a European usage; the connectors appear to be electrically and mechanically equivalent to SMC.