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Style 681 is designed for use in lightweight flanges and is compatible with water and most hydrocarbons.

Nominal Pipe Size: 1/2
Pressure Rating (lbs): 150
Flange Standard (ASME): ASME B16.5
Thickness (In.): 1/8
Inner Diameter (In.): 0.840
Outer Diameter (In.): 3.500