Standard N male connectors for use with LMR-400, RFC400, RG-8/U or Belden 9913 Coax cable. They are used for a wide variety of connections to terminate coax at a N Female jack. These are the most common connector for ISM antennas sold. The body plating is Silver, the center pin is Gold and the dielectric is Teflon. Center pin attachment is crimp (.128 die) or solder type, and outer ring is crimp (.429 crimp tool needed).