Type: BNC female plug bulkhead solder flange mount connector Attachment Method: Solder Mount Method: 4 Hole Flange Interface Type 1: Solder Cup Interface Type 2: BNC female jack Impedance: 50 ohm Body Material: Brass Body Plating: Nickel Dielectric Type: PTFE BNC female 4 hole flange connector uses shield/contact solder as an attachment method. Application: These bnc connectors are easy to solder to monitors, broadcast , telecommunication devices, test equipment, test boards, modules, RF Applications, PC/LAN board, amateur radio transceivers and amplifiers, Cable Modems etc. Package Incluce: 5pcs RF BNC small square plate BNC female flange PCB board welding joint