These are the metal hinges that get attached to the kiln case and mate with the hinge parts that are welded to the element cover boxes. There are two hinge parts and four mounting screws.
Mounting Kit for Long Type K Thermocouples - Kit includes two #8 3" Screws, six 1/2" high Ceramic Spacers, and is used for all Pyrocil Type K and all Long 8 Gauge Type K (Exposed) Thermocouples