Hello I removed the burn pot for cleaning. The Lytherm gasket disintegrated which is almost normal but when I turned the left bolt to remove the burn pot the bolt head SNAPPED! The bolt shaft was still in the nut since it broke close to the head. Looks like a special nut that goes into a hex hole in the bottom of the burn box with a flange on top that holds the nut on the sheet metal. See pics below. It looks like a standard all thread Cap Hex Head Bolt that is 1/4 x 20 x 1" long The nut of course is special OEM job but I did bend the flange and twist it out. Should I replace with a Stainless Steel Bolt and Nut. How about a Wing Nut?