The Brass Fuel Tank Filler Cap is a hardwearing option designed to cap off the fill point of a fuel storage tank or valve. A tank needs a fill point cap to prevent dripping and stop unwanted debris and rain water from entering into the tank. Whilst popular as a diesel or oil tank cap, this brass model can be used for a variety of applications providing that the fluid is compatible. The brass fuel tank filler cap comes with lugs either side of the cap to enable easily application and removal by hand, as well as a sealing washer. A range of sizes are available - see measuring guide download if you are unsure which size you need.