2.4MM is Sub miniature screw-on precision connector, operating in the range DC-50 GHz
50 ohms / part series R327
2.4 mm connector was developed in 1986 to provide repeatable measurements after hundreds of mating cycles at very high frequency. It is standardized per IEC 61169-40.
The range includes ultra low loss phase stable SHF cable assemblies qualified at 50 GHz.

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