Allied Electronics Corporation is the manufacturer of Circular Bayonet Coupling Connectors. Allied Electronics Corporation is an ISO 9001: 2000 certified company. The Circular Bayonet Coupling Connectors are designed for the most difficult environment conditions in the Circular Connector Industry. The insulators, grommets and `O` rings are all made of high quality Polychloroprene that can withstand temperature extremes from -55 Degree C to +125 Degree C. In the Circular Bayonet Coupling Connector a quick 120 degree turn of the coupling nut and it audibly locks into place.