The D2041874 is a female screw lock kit designed to ensure a positive, secure mating for D-Sub connectors. This kit is constructed from steel with a yellow chromate over cadmium finish for corrosion resistance. Each kit consists of one nut with a #4-40 NC-2B thread, three washers, one lock washer, and one hex nut. A maximum assembly torque of 6 inch-pounds is recommended. This hardware is suitable for both front and rear panel mounting, providing a reliable locking mechanism for applications subject to high vibration.