1-745967-4 is an AMPLIMITE HD-20 subminiature D-type receptacle connector designed for reliable PCB interconnection applications. This connector features 25 contact positions in a shell size 3 configuration with fixed female screwlocks for secure mating. The socket contacts are made of phosphor bronze with gold plating on the mating end and tin-lead on the termination end, with nickel underplating for enhanced durability. The shell is constructed from tin-plated steel, while the housing is made from 94V-0 rated black thermoplastic. Common applications include industrial equipment, instrumentation, and computing systems where robust D-sub connectivity is required.