The SMKey Connectors from Southwest Microwave are high-security SMKey 3.7 mm DC to 18 GHz Keyed Coax Connectors, which provide a failsafe mating solution for critical connections between mated connector pairs. This connector assigns differing key positions for mating pairs within a set, eliminating the risk of interconnect mismatch. This unique solution ensures reliable protection against the potential for operator error that could otherwise have devastating results in connection-critical applications.