This is a dual threaded straight stud made to AN126288 specifications, with one side at 5/16-24 thread pitch and the other at 5/16-18 non standard pitch.  We supplied this part to our aerospace customer at approximately 300 pieces per order.  AMS 6322 steel was used as the material, heat treated to 26-32 rockwell hardness and Cadmium plated to AMS 2400 specification.  Material, heat treat, and plating certs were provided with the parts.