Blind Flange Flat Face 4 in Nominal Pipe Size Flanged x Blind 9 in Flange Outside Diameter 7/8 in Flange Thickness 9 in Overall Length Aluminum Class Class 125 For Pipe Schedule 40 125 psi Maximum Operating Pressure 185 psi Max Steam Pressure 0 Degrees to 270 Degrees F Number of Bolt Holes 8 5/8 in Bolt Hole Diameter