Specification:Fangyuan has strong design and manufacture capability for all kinds of caps, including radiator cap, expansion cap and fuel cap.Fuel cap is assembled by POM plastic parts, acrylonitrile-butadiene rubber and spring, Pressure, flow rate and torque follow the ASTM and JIS standard. Thread on the cap is in common with SAEJ1114 standard. Lock function is available according to customer’s demands.