Amphenol SD Series High Density D-Sub Plug Connectors with Solder Cup Terminals SD series high density D-Sub plug connectors with solder cup terminals and precision stamped and formed contacts. These SD series HD d-sub plug connectors have a tin plated steel shell with dimples, a glass-filled thermoplastic UL 94V-0 insulator with closed entry contact cavities, gold flash plated pin contacts and 3.05 holes for front mounting. Typical applications for these SD series high density d-sub plug connectors include industrial, telecom and any industry standard I/O applications.