Blind Flange Raised Face 4 in Nominal Pipe Size Flanged x Blind 10 in Flange Outside Diameter 1 1/4 in Flange Thickness 1 1/4 in Overall Length Stainless Steel 304/304L Class Class 300 720 psi Maximum Operating Pressure 300 psi Max Steam Pressure Number of Bolt Holes 8 7 7/8 in Bolt Circle Diameter 7/8 in Bolt Hole Diameter