Blind Flange Flat 3/4 in Nominal Pipe Size Blind 3 7/8 in Flange Outside Diameter 7/16 in Flange Thickness Schedule 80 Class Class 150 For Pipe Schedule 80 CPVC 150 psi Maximum Operating Pressure 176 Degrees F Number of Bolt Holes 4 2 3/4 in Bolt Circle Diameter 9/16 in Bolt Hole Diameter 1/2 in Overall Length Gray