DEF Tank Locking Caps
As little as .169 ounces/5ml of diesel or other fluids in a DEF or AdBlue Reservoir can cost thousands of dollars in aggravating service repairs. Stops contamination and costly engine repairs. Prevents sabotage, theft, and/or cross contamination. Free spins when locked.
Blue caps easily identify DEF tank filler neck, and are easily distinguished from other vehicle tanks. Features a locking mechanism to prevent theft, vandalism, or accidental incorrect fluid fills.