The weldless tank bung can be utilized when an alternate fuel source is required, such as when adding a nitrous oxide wet kit. This bung will work on any tank with a wall up to 5/8 thick. Installation requires a 9/16 mounting hole in the tank. The bung accepts any 1/8 NPT male hose fitting. CNC machined from billet aluminum. Includes a high-quality Viton o-ring for a positive seal, stainless steel nut and washer, and 80 micron filter.