Nipple Application Air Natural Gas Oil Potable Water Steam Fitting Compatibility Class 300 Gravity Flow No Inside Diameter 3/8 in Material Red Brass Material Grade ASTM B43 Maximum Operating Pressure 276 psi @ 450 Degrees F Maximum Operating Temperature 400 Degrees F Maximum Steam Pressure 276 psi @ 450 Degrees F Metal Pipe Construction Seamless Minimum Operating Temperature -20 Degrees F Nominal Pipe Size 3/8 in Outside Diameter 43/64 in Overall Length 3 1/2 in