●[Size] The thread size of 6an is 9/16-18 UNF;OD of barb: 1/4 inch. ●[Parameter] Max Pressure: 4000PSI; Working Temp Range: -40°F to +248°F. ●[Material] Made of 6061-T6 aluminum alloy. ●[Seal] AN side is sealed with 37 degree angle. ●[Application] Only work with rubber hose. It is recommended to use clamps to ensure a better seal during installation.