The DC51222-1 is a sliding lock retainer assembly designed for use with D-Subminiature connectors with a DC/37-pin shell size. This kit consists of one sliding lock plate made from passivated stainless steel, along with two mounting screws, two lock washers, and two hex nuts made from steel with a trivalent chromate over zinc finish. The mounting screws feature a #4-40 NC-2A thread. This hardware ensures positive mating and provides robust locking and latching, making it ideal for high-vibration applications where a secure connection is critical.