Display Pack of 1 (497929S) fuel tank cap. Used on selecting 3.5 and 3.75 HP Classic and Sprint Engines as well as 4 HP Quattro and 450-600 Series engines this OEM part ensures proper fit and performance to maintain the life of your Briggs & Stratton engine. Help keep your outdoor power equipment running at peak performance by using Briggs Stratton replacement and maintenance parts. Only Briggs Stratton genuine parts are specially designed to exact OEM standards manufactured and tested to help deliver optimum performance in Briggs Stratton engines