The 745783-4: The 4-40 threaded flange on the housing/shell provides the standard mechanical lock to the mating plug — the same thread found on DB-25 panel cutouts across the industry.
The 30.0µin gold-over-phosphor bronze contacts give the mating interface corrosion resistance and cycle life for field-service connections — gold at this thickness handles hundreds of mate-unmate cycles without fretting, which matters when the cable end gets swapped during maintenance.
Mounting and Termination Check
Through-hole right-angle mounting: the solder tails insert into the PCB and are wave-soldered. The 0.318" (8.08mm) backset spacing sets the distance from the PCB edge to the mounting flange face — confirm this dimension against your enclosure wall thickness and the mating plug's cable bend radius before laying out the board. The 4-40 threaded insert accepts standard D-sub hardware; torque to 0.3–0.5 N·m per industry practice, not more.