Glenair Series 28 High Performance D-Subminiature (HiPer-D) Connectors are intermateable and intermountable with standard M24308 type D-Subs and meet the need for improved performance in hostile environments. Glenair Series 28 HiPer-D features a rugged machined aluminum shell, waterproof sealing, and optional ground springs for improved resistance to electromagnetic interference. Gold-plated size #20 contacts conform to M39029/64-369 and accept #20 to #24 AWG wire. Gold-plated size #22 contacts conform to M39029/58-360 and accept #22 to #28 AWG wire. The dielectric inserts are made with thermoset epoxy for improved resistance to chemicals and are capable of withstanding 200°C continuous operating temperature. Aerospace-grade fluorosilicone grommets and face seals provide IP67 watertight sealing. Integrated grounding fingers provide superior electromagnetic compatibility. Series 28 is available in every standard and high-density M24308 layout as well as combo layouts integrating power and shielded contacts.