The X20080201 is a splash cover and hex nut assembly with an integrated O-ring, intended for use with high-performance thermal circuit breakers. This accessory features a nickel-plated M12x1 hex nut and is designed to provide IP54-rated protection against dust and splashing water. It is approved to VG 95345, part 23, ensuring it meets specific military and industrial standards. This assembly enhances the durability and reliability of circuit breakers by protecting them from environmental contaminants in various applications.