Amphenol AN-3057-12 MS Circular Connector Mil-Spec

The Amphenol AN-3057-12 MS circular MIL-SPEC connector is an eight-pole unit built around a 20-7S insert pattern, a member of Amphenol’s rugged MS-series circular connectors designed for demanding military and aerospace environments. The 20-7S insert arrangement provides eight contacts in a defined layout within a compact cylindrical shell, enabling a single interconnect to carry multiple circuits while preserving reliability under vibration, shock, and temperature cycling. This configuration is cataloged within the Amphenol MS3057-12A family and appears in distributor listings as MS3057-12A, reflecting its established role in MIL-SPEC interconnect ecosystems. For exact mating halves, termination options, and environmental sealing details, consult the official Amphenol MS3057 datasheet and your distributor’s product page to ensure compatibility with your equipment.