Threaded Flange, Flat Face, 3/4 in Nominal Pipe Size, Flanged x FNPT, 3 7/8 in Flange Outside Diameter, 3/8 in Flange Thickness, 3 7/8 in Overall Length, Aluminum, Class Class 125, For Pipe Schedule 40, 125 psi Maximum Operating Pressure, 185 psi Max.