The Molex 1731070158 is a D-Sub combo plug from the F, FCT 173107 series, shell size DA-A (3W3 layout), with 3 positions that accept coax or power contacts. It is a free-hanging (in-line) plug designed for cable-side mounting, with a 4-40 threaded flange on the cable side for secure panel attachment. The shell is steel with tin plating, and the housing is black PBT. Grounding indents on the shell provide a low-impedance path to bleed shield current before it reaches the signal pins.
The 3W3 layout means three contact cavities in a DA-size shell, typically used where a mixed-signal/power or RF interconnect is needed in a single connector body.