MACH-D D-Sub Connectors Positronic MACH-D D-Sub Connectors are high-performance D-sub connectors for use in harsh environments. MACH-D Connectors feature a precision machined shell that provides EMI shielding protection. The grounding strip on this Positronic D-sub series provides excellent electromagnetic compatibility (EMC). A mechanically rugged machined shell protects against shock, vibration, and impact. IP67 configurations protect against fluid and dust ingress. These connectors are high-performance M24308 intermateable.