Brake Line Nut Application Brake Line Fitting Thread Size M12-1 Fitting Material Steel Hex Size 1/4 in Maximum Operating Pressure 3 000 psi Maximum Operating Temperature 200 Degrees F Specific Fitting Shape Nut Compatible Auto Systems Motorized Vehicles Compatible Tube Outer Diameter 1/4 in Fitting Connection Type Inverted Flare Minimum Operating Temperature 40 Degrees F Package Quantity 4