The U1831 is a sealing boot assembly designed to protect 9500 series pushbutton switches from environmental contaminants such as dust, sand, and water. This model consists of a black silicone boot and a corresponding black, brass hex nut. The boot is specifically engineered for switches with a Ø 4 x 0.70 mm bushing. Due to its silicone construction, it operates reliably across a wide temperature range from -40 °C to +85 °C, offering excellent elasticity and mechanical resistance. This makes the U1831 an ideal solution for ensuring switch longevity and performance in demanding applications.