A coaxial RF connector (radio frequency connector) is an electrical connector that operates at multi-megahertz radio frequencies. RF connectors are frequently used with coaxial cables and are meant to keep the coaxial design's shielding. The change in transmission line impedance at the junction is also minimized with better models. They provide a fastening mechanism (thread, bayonet, bracing, blind mate) and springs for a low ohmic electric contact while sparing the gold surface, allowing for extremely high mating cycles and lowering insertion force.