Amphenol MS3456W28-21SX Circular Connector Plug

Amphenol MS3456W28-21SX Circular Connector Plug is a 37-position circular MIL-SPEC plug from Amphenol Aerospace Operations, built around shell size 28 to fit compact, high-density installations. This crimp-contact plug uses female sockets and is designed to mate with a corresponding MS3456 receptacle in the same family, delivering reliable signal and power paths in high-vibration environments. The MS3456W28-21SX configuration provides a dense 37-position arrangement in a compact cylindrical shell, making it suitable for avionics, military equipment, and rugged industrial applications where space is at a premium. Availability from major distributors such as DigiKey and Mouser confirms ongoing supply of the crimp-contact version and compatible mating parts, with the Amphenol Aerospace Operations lineage ensuring proven performance in demanding conditions. Common applications include aerospace avionics, military ground-support equipment, and other rugged systems that require durable, secure circular connectors.