SMA Female 2-Hole Chassis Connector. Extended Teflon dielectric. Gold plated. These are from our projects, the specs have long since been forgotten, however they are a well made higher performing connector. Flange to RF pin tip is about .700" and the dielectric is about .600" in length. Hole to hole centers are about .480" and will accept a 2-56 screw. Open box from our bins.