SMC RF connectors are semi-precision, subminiature devices that provide repeatable electrical performance from DC to 10 GHz. The SMC family of connectors fill subminiature requirements, while providing a semi-permanent connection with their screw on mating mechanism. 
They are best suited for use with cables in the range of .070" to .120" diameters, such as RG-178, RG-174, and RG-316. 
The series is similar in size to SMB connectors. SMC type connectors are designed to conform to MIL-C-39012 specifications.
Typical applications for SMC connectors are telecommunications, test equipment, instrumentation and GPS.

TECHNICAL CHARACTERISTICS
Temp. Range ...................-65～ +165℃  (PE Cable -40--+85)
Impedance ...................50Ω
Frequency Range................... DC-10GHz
Working Voltage ...................250V rms
Withstand Voltage ...................750V rms

Contact resistance
Center Contact ................... ≤3mΩ
Outer Contact .................... ≤2mΩ
Insulation resistance ..............≥1000 mΩ
Insertion loss a...................0.15 dB/6GHz
VSWR Straight ...................≤1.25
     Right angle ................≤1.35
Durability(mating) ..............500(cycles)

MATERIAL & PLATING
Shell.................Brass ...........  ........Goldplated
Inner conductor.......Beryllium or tin brass ....Goldplated
Insulator ............PTFE
Crimping suite........Copper alloy ..............Nicked or goldplated

APPLICABLE STANDARD
MIL-C-39012;
CECC 22140;
IEC 60169-9
VG95286