Update your semi truck with secure and leak-free fuel, with the Fuel Tank Accessories 2.88" Non-Locking Aluminum Fuel Cap that ensures you're Ready for the Road Ahead. Due to its tight-fitting design, this replacement fuel cap is able to lock fluids in a tank while resisting torque or other forces that cause similar components to loosen. Constructed with an ergonomic body to enhance the ease of constant on / off twisting. FleetPride is your First Click in Heavy Duty.