... maxRG178, 196: 250 volts rms maxDielectric Withstanding VoltageRG174, 188, 316: 750 volts rms maxRG178, 196: 500 volts rms maxContact Resistancecenter contact ... lbs minDurability500 matingsCoupling Nut Retention40 lbs min SMC connector M ST for 50ohm RF connector