High Pressure Brass Pipe Fittings Dowty Washers Bonded Seal. Zinc plated mild steel. Nitrile seal. 

Extremely simple pressure gasket. Efficient and reliable means of face sealing at high and low pressures. Positive and leakproof action. Reduction in bolting torque. No flow or flattening of metal washer under tightening loads. Elimination of groove cutting or special machining. Reusable when remaking joints. Continuous operation at -40C to +100C. Reduces machining, installation and maintenance costs.