OSP miniature modular panel mount blind-mate 4 hole flange mount plug receptacle with a stainless steel passivated body, a TFE Fluorocarbon dielectric and a fluorosilicone o-ring. This OSP miniature modular flange mount plug has a gold plated berylium copper centre contact and operates in the range of DC to 18 GHz with an insulation resistance of 5000 MΩ