Flare Nut Application Air Flammable Liquid Freon Inert Gases Non-Combustible Gases Fitting Thread Size 1/2-20 Flare Angle Inverted Fitting Material Brass Hex Size 1/2 in Maximum Operating Pressure 1 200 psi Maximum Operating Temperature 250 Degrees F Overall Length 5/8 in Specific Fitting Shape Flared Nut Compatible Tube Outer Diameter 5/16 in Standards SAE J512 Compatible Tube Material Aluminum Brass Copper Steel Fitting Connection Type Flared