Pingel Weldless Tank Bung 62136 Use when an alternative fuel source is needed, like when installing a nitrous oxide wet kit on fuel-injected motorcycles or as a fitting for an oil tank Requires a 9/16in. hole for mounting; will work with any tank up to 5/8in. wall thickness 1/8in. NPT internal thread size CNC-machined from billet aluminum; includes a high-quality VIton O-ring for a positive seal, a stainless steel nut and washer and an 80 micron filter Made in the USA