The Molex 1731090855 is a 15-position D-Sub receptacle from the FCT 173109 series, built for signal-level interconnects in industrial and data equipment. It uses machined copper alloy contacts rated 5A each, with solder-cup termination for wire attachment. The shell is steel with tin plating, and the dielectric is glass-filled polyester rated UL94 V-0. This is the female side of a standard DA-15 (2-row, A-shell-size) D-Sub interface — mates with any standard 15-position male D-Sub plug.
The flange is unthreaded (housing/shell type), so panel mounting uses clearance holes for M3 or 4-40 screws — no threaded inserts in the receptacle itself. The through-hole solder tails are for PCB mounting, but the solder-cup termination also allows direct wire soldering for cable harnesses. The white color of the dielectric is a visual identifier, not a functional spec.