Telegartner 50 Ohm SMA Straight RF Coaxial Crimp Plug Connectors. 50 Ohm SMA straight RF coaxial plug connectors with a threaded coupling and solder/crimp termination. These RF coax SMA crimp plugs have a nickel plated body, gold centre contact and have mating face sealing between plug and jack according to IP68. Typical applications for these SMA plug connectors include communications, satellite and test equipment.