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    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.

    All Parts

    Part # Product # Description Type Cam Type Locking Venting Neck Diameter Cap Depth

    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.

     

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