CONNECTOR CIRCULAR SIZE 18 66WAY; Military Specification:MIL-DTL-38999 Series II; Circular Connector Shell Style:Box Mount Receptacle; No. of Contacts:66Contacts; Circular Contact Type:Crimp Pin - Contacts Not Supplied; Coupling Style:Bayonet; Insert Arrangement:18-35; Connector Body Material:Aluminium Alloy Body; Connector Body Plating:Olive Drab Chromate over Cadmium; Contact Material:Copper Alloy; Contact Plating:Gold; Insert Rotation:N; Service Class:Environmentally Sealed; Product Range:MIL-DTL-38999 Series II