https://www.4statetrucks.com/bestfit-2-5-inch-8-tpi-locking-fuel-cap-with-thermal-relief-03-060314
BESTfit 2.5 Inch 8 TPI Locking Fuel Cap With Thermal Relief For Freightliner FL70 & FL80 - 4 State...
High Quality Locking with Thermal Relief * Fits Business Class Rectangle Tanks With 2.5 Inch 8 TPI UN Thread * Sold Individually * Warranty On Fuel Cap Against...