Flange Flat 3/4 in Nominal Pipe Size Female NPT 3 13/16 in Flange Outside Diameter 7/16 in Flange Thickness Schedule 80 Class Class 150 For Pipe Schedule 80 PVC 150 psi Maximum Operating Pressure 140 Degrees F Number of Bolt Holes 4 2 3/4 in Bolt Circle Diameter 9/16 in Bolt Hole Diameter 7/8 in Overall Length Gray