Areyourshop 1Pc Connector PL259 UHF Male 1/2" For Corrugated Copper Standard Andrew Heliax Connector outer conductor: Male Connector center conductor: Plug Insulators: PTFE Impedance: 50 Screw Thread Type: English Body: Brass, Nickel plating Contact Pin: Brass, Gold plating For Cable center conductor Dia: 0.19&quot; For RF coaxial cable: 1/2 &quot; Attachment of cable center conductor: Slide-on Coupling Connector Coupling Mechanisms: Screwed Coupling Attachment of cable outer conductor: Clamped