RP-N female connector for use with LMR-400, WBC-400, RG-8/U or Belden 9913 Coax cable. They are used for a wide variety of radio connections to terminate coax at a male RP-N plug. They are sometimes used for ISM radios. The body plating is Nickel, the center pin is Gold and the dielectric is Teflon. Center pin attachment is a crimp type (.118), and outer ring is crimp (.429 crimp tool needed).