The 790020 RFI/EMI Shielded Nut Assembly is intended to provide RFI/EMI shielding for TA790 or TA890 series valves. The honeycomb plug allows air to pass through and is joined to the housing with silver-filled conductive epoxy to form a Faraday cage. This protects the interior of the container from unwanted radio frequency and electromagnetic radiation. The plug and the housing are both made of MIL-DTL-5541, Type 1, Class 3 conversion coated aluminum.
To complete the Faraday cage, the interior surface of the container must also be conductive. When the 790020 is installed, this surface contacts a fluorosilicone base conductive gasket, which creates a conductive path between the container wall and the housing. Other gasket base materials are available upon request.
Four grooves in the wall of the nut provide a convenient gripping point for a hook spanner wrench for tightening.
A filter can be incorporated into this nut in addition to the honeycomb plug; ask for further details.