The Standard Ignition NS 21 Neutral Safety Switch is a critical component designed to enhance the safety and reliability of vehicle ignition systems This switch ensures that the engine starts only when the transmission is in the Park or Neutral position preventing accidental starts that could lead to unintended vehicle movement Constructed with high grade materials the NS 21 offers durability and consistent performance meeting the stringent demands of today s service professionals Its copper alloy conductors provide superior electrical conductivity with low resistive losses ensuring efficient operation The switch undergoes 100 testing to verify both mechanical and electrical switching performance guaranteeing quality and reliability Designed for easy installation the NS 21 features a bolt mount attachment method and a rectangular connector with five male blade terminals compatible with a 12V system Its compact dimensionsa 2 15625 inches in lengtha allow for straightforward integration into various vehicle models The switch is compatible with a range of vehicles including certain models from Chevrolet Pontiac and Oldsmobile as detailed in the product specifications By incorporating the Standard Ignition NS 21 Neutral Safety Switch into your vehicle s ignition system you can enhance operational safety and ensure reliable engine start up thereby reducing the risk of unintended vehicle movement and potential accidents