The Molex 1727040102 is a two-piece metal backshell from the FMK / FCT 172704 series, designed for 37-position D-sub connectors. It provides a shielded, 180° straight cable exit for round cable assemblies, with a zinc die-cast body and nickel plating. The backshell includes 4-40 mating screws, a cable clamp, and strain relief — all the hardware needed to terminate the cable shield and secure the connector pair. It fits standard D-sub size C shells and is also compatible with high-density 62-position shells that share the same shell size.
Shielding and Hardware — What's Included
The shielded design means the backshell encloses the connector and cable braid, providing a continuous EMI/RFI barrier — useful in industrial control cabinets or test equipment where noise coupling into the cable matters. The 4-40 mating screws are the standard thread for D-sub connectors; they thread into the mating connector's threaded inserts to lock the pair together. Assembly hardware, cable clamp, and strain relief are all included in the package, so no separate hardware order is needed. The cable clamp grips the round cable jacket, and the strain relief prevents the termination from pulling apart under cable flex.
Position Count and Shell Compatibility
The 37-position backshell is sized for standard 37-pin D-sub connectors. It also lists compatibility with HD62-position connectors — both use the same size C shell.