DuraMate™ AHDM Circular Metal Connectors Amphenol Sine Systems DuraMate™ AHDM Circular Metal Connectors are IP68 / 69K (mated), environmentally sealed, multi-pin, heavy-duty, metal (AHDM), circular connectors. These connectors can withstand the challenges and complexities of harsh-environmental off-road applications. These connectors are designed with a three key-way quick-connect bayonet locking system to ensure proper mating of the connectors. The series is available in size 24 with 13 insert arrangements and in size 18 with 6 insert arrangements. Amphenol Sine Systems DuraMate AHDM Connectors feature high-current configurations incorporating RADSOK® contacts, high-density signal, and mixed power insert configurations. These vibration-resistant connectors have an operating temperature range of -55°C to +125°C.