The N-KFD2 from Mechanc is a RF Connector with Frequency DC to 18 GHz, Operating Temperature -55 to 165 Degree C, Pin Diameter 0.51mm, Voltage Rating 1500 Vrms (Dielectric Withstanding Voltage), VSWR 1.20:1. Tags: Standard. More details for N-KFD2 can be seen below.