BUT-4075 is an electrical connector manufactured by Russell. It is a male snap connector with a 4-pin connector. It is used to securely connect two wires, and is resistant to wire pullouts. The pins are moulded in place, and a single button release is used to disengage the connection. The pins are gold plated, and the outside casing is made from black plastic. The connector has an operating temperature range of -20°C to +105°C.