CONNECTOR CIRCULAR 13-4 4WAY SIZE 13; Military Specification:MIL-DTL-38999 Series III; Circular Connector Shell Style:Wall Mount Receptacle; No. of Contacts:4Contacts; Circular Contact Type:Crimp Pin; Coupling Style:Threaded; Insert Arrangement:13-4; Connector Body Material:Stainless Steel Body; Connector Body Plating:Passivated; Contact Material:Copper Alloy; Contact Plating:Gold; Insert Rotation:A; Service Class:Corrosion Resistant EMI Firewall; Product Range:MIL-DTL-38999 Series III