Mansfield 630-0204 2" SmartFasten Tank to Bowl Kit
Includes tank to bowl gasket, three patent-pending bolts, three nuts and ballcock coupling nut:
Hassle Free: The bolt locks in place, so no reaching into the tank while tightening the nut
Washer Free: A rubber seal is already molded onto the bolt.
Rust Free: Since the bolt's head is rubber, water never comes into contact with metal