Flange, Flat, 4 in Nominal Pipe Size, Flanged x Blind, 9 in Flange Outside Diameter, 15/16 in Flange Thickness, 9 in Overall Length, Aluminum, Plain, Class Class 125, For Pipe Schedule Schedule 40, 125 psi @ 72 Degrees F Maximum Operating Pressure, 185 psi Max. Steam Pressure, 0 Degrees to 270 Degrees F, Number of Bolt Holes 8, 7 1/2 in Bolt Circle Diameter, 3/4 in Bolt Hole Diameter