the metal on top of the rubber washer came away when under heat for less than 2 minutes. They told me once I contacted them that these screws can’t handle heat. which is strange as every single hex head screw with a washer I have ever purchased can handle it. Their products are cheap and bad quality. Bought screws from them previously and they sent the wrong colour screws. I asked for pictures of the screws before they shipped them and they showed me different screws to cover up their mistake. So they are liars. poor quality product and support.

very good