Circular MIL Spec Contacts are contacts that meet the requirements set forth in MIL-C-39029 (MIL-SPEC), a military-level standard agreement regarding interface contacts used in dry and modular connectors. These contacts are used in applications where reliability and efficiency are of the utmost importance, such as military and aerospace systems. Circular MIL Spec Contacts feature a split pin and conductive element for an electrical connection, a closed either open or closed face contact cup, and a head locking mechanism. The contacts come in many varieties and shapes such as pins, Arincs, contacts, connectors, and receptacles. In addition, these contacts must pass rigorous testing and meet a specific set of criteria in order to be approved for use. This ensures that any parts manufactured with Circular MIL Spec Contacts are reliable and will perform in the toughest of applications.