745412-1 is an AMPLIMITE HD-20 full metal-shell straight posted D-subminiature plug connector featuring 25 contact positions with grounding indents. This shell size 3 connector has dimensions of 2.088 inches (53.04 mm) for dimension A, 1.852 inches (47.04 mm) for dimension B, and 0.494 inches (12.55 mm) for dimension C. The connector features a tin-plated steel shell, 94V-0 rated black thermoplastic insert, and brass pin contacts with gold plating (Code A) on the mating end and tin-lead on the termination end with nickel underplating. Ideal for applications requiring reliable signal connections in industrial, telecommunications, and computing equipment where robust metal-shell construction and grounding capability are essential.