Shell Size, Gender, and Termination — the DE-9 Right-Angle Receptacle
The TE Connectivity 5745781-6 is a 9-position D-Sub receptacle from the AMPLIMITE HD-20 series, housed in a DE-9 shell (shell size 1, layout DE, E).
The thermoplastic dielectric (UL94 V-0 rated) and the steel shell with tin plating handle the thermal load, but for sustained high-current duty on multiple pins, derating per the manufacturer's curve is advised.
Mounting and Hardware — the Female Screwlock (4-40)
The flange feature is a mating-side female screwlock with 4-40 thread — this is the receptacle side that accepts a male jack-screw from the plug half. The screwlock provides positive mechanical retention, critical in vibration environments like industrial machinery or test equipment where a loose D-sub can cause intermittent contact. The shell material is steel with tin plating, giving good EMI shielding and corrosion resistance for indoor use.