The STANDARD IGNITION NS 67 SI Neutral Safety Switch is engineered to ensure the safe operation of Ford E Series and F Series vehicles by preventing engine start when the transmission is in gear This switch is compatible with various models including the Ford E 150 E 250 E 350 F 150 F 250 and F 350 providing a direct fit for these applications Constructed with a robust combination of metal and plastic materials the NS 67 SI offers durability and resistance to the demanding conditions of commercial and fleet operations The switch features a male connector with four female terminals facilitating a secure and reliable electrical connection Designed for easy installation it measures approximately 3 97 inches in length 1 5 inches in width and 1 inch in height fitting seamlessly into the designated mounting area The NS 67 SI operates at a voltage of 12V aligning with the electrical systems of the specified Ford models By incorporating this neutral safety switch fleet operators can enhance vehicle safety reduce the risk of accidental engine starts and ensure compliance with safety standards thereby contributing to the overall efficiency and reliability of their operations