Aeroquip Medium Pressure Rubber Hose No. 303 is generally rated at operating pressures of 1500 psi. 303 will operate with pressure up to 3000 psi in sizes -3, -4, and -5. The larger the hose, the lower the recommended operating pressure.
No. 303 is constructed with a seamless synthetic rubber inner tube. Reinforcement consists of a rubber impregnated cotton braid designed to bond the inner tube to its overlying single-layer wire braid which is then covered by a synthetic rubber impregnated oil-resistant fabric braid. The outer cover is designed to be oil, mildew, and abrasion resistant.
This hose is used for aircraft hydraulic, pneumatic, fuel, oil, and coolant systems. Operating temperature is from -65°F to +250°F. Use with Aeroquip 491 Fittings.