1658538-3 is an HDP-20 crimp snap-in D-subminiature connector designed for cable assembly applications requiring reliable electrical connectivity. This Shell Size 3 connector accommodates 25 contact positions and features a tin-plated steel shell with a 94V-0 rated thermoplastic insert, providing robust shielding and durability. The connector dimensions are 2.088 inches (Dim. A), 1.852 inches (Dim. B), and 0.494 inches (Dim. C), with a standard clinch nut mounting method. It supports recommended cable outer diameters ranging from 0.165 to 0.455 inches, with a maximum inner cable bundle diameter of 0.350 inches after jacket and braid removal. This connector is widely used in industrial machinery, medical instrumentation, computers, RAID storage arrays, and telecommunications equipment where secure, intermateable D-subminiature connections are required.