Beautifully CNC machined carbon steel fuel tank cap and adapter. Silver zinc-plated for corrosion resistance and durability. Built-in vent allows for pressure release at 1.5 psi and vacuum relief at 1.5 oz. Adapters have 'flats' machined on to the sides to assist tightening onto the tank. Fits all 2'' female threaded tanks. Cap is secured to adapter with any 5/16th diameter shackle padlock (not included). Inside gasket provides sealing and prevents spillage of the tank contents. May be susceptible to some spillage during the very brief venting time period.
