Coaxial RF adapters maintain the shielding of the coaxial cable, and are designed to work with radio frequencies. The fastening mechanism allows for high mating cycles and a reduction in the insertion force. In todays standard, ultra high frequencies are frequencies between 300 MHz and 3 GHz. 

The SMA connector has a screwable coupling mechanism and is the industry standard for antenna connection. The SMA connector is also used in many devices in the high-frequency range. SMA stands for sub-miniature version A. 

The UHF connector is a threaded RF connector, and is a widely used standard connector for HF transmission lines on full-sized radio equipment. These RF coaxial connectors have a threaded coupling, and this prevents them from being removed accidentally. It also enables them to be tightened sufficiently to enable a good low resistance connection to be made between the two halves.

This is a SMA FEMALE TO UHF MALE ADAPTER; N-G-T

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