Winchester’s KINGS® brand N series RF connectors are high quality medium-size connectors for coaxial cables from .350inch to .450inch OD. However, designs accommodate .078inch to .875inch cables. The N connector is a 50 Ohm constant impedance connector. VSWR is consistently low across its frequency range of 0 to 11 GHz. The mating face uses an air dielectric section. The N connector is a weatherproof unit and, with its threaded coupling, incurs low noise and withstands shock and vibration. The N connector is the most popular medium-size connector, widely used in test equipment. Items qualified to MIL-PRF-39012 appear in the latest QPL list for MIL-PRF-39012.