The 3.5-KFD22 from Mechanc is a RF Connector with Frequency DC to 26.5 GHz, Operating Temperature -55 to 165 Degree C, Pin Diameter 0.46 mm, Voltage Rating 500 Vrms (Dielectric Withstanding Voltage), VSWR 1.20:1. Tags: Standard. More details for 3.5-KFD22 can be seen below.