The Euclid 2-5/8" Drive Axle Spindle Lock Washer is designed to fit on axles with a diameter of 4". This washer features a unique design that allows it to lock onto the spindle of the axle, preventing it from rotating or coming loose. This ensures the safe and efficient operation of heavy duty vehicles. The washer is made of high strength steel, making it resistant to wear and tear and corrosion. This washer is the perfect choice for any axle spindle application. FleetPride is your First Click in Heavy Duty®.