The 10-821771-000 is a dummy receptacle shell accessory from the Amphenol 97 series, used to provide a stowage location for 97 or AS50151 plugs when they are not mated. This component is equivalent to a standard MS receptacle shell but is supplied without an insert or contacts, offering a protective housing. It is available in various plating options, including the standard olive drab chromate over cadmium and several RoHS-compliant finishes such as black zinc alloy and electroless nickel. By shielding the plug from physical damage, dirt, and dust, it helps maintain the integrity and reliability of the interconnect system.