CONNECTOR, CIRC, 18-53, 53WAY, SIZE 18; Military Specification:MIL-DTL-38999 Series II; Circular Connector Shell Style:Jam Nut Receptacle; No. of Contacts:53Contacts; Circular Contact Type:Crimp Socket; Coupling Style:Bayonet; Insert Arrangement:18-53; Connector Body Material:Aluminium Alloy Body; Connector Body Plating:Clear Chromate over Cadmium; Contact Material:Copper Alloy; Contact Plating:Gold; Insert Rotation:N; Service Class:Environmentally Sealed; Product Range:MIL-DTL-38999 Series II