Flange, Application Air, Non-Potable Water, Fitting Side A Connection Type Cup, Fitting Side B Connection Type Flange, Fitting Side A Copper Tube Size 1 1/2 in, Fitting Material Cast Copper, Fitting Side A Tube Outer Diameter 1 5/8 in, Maximum Operating Pressure 100 psi @ 100 Degrees F, Maximum Operating Temperature 400 Degrees F, Specific Fitting Shape Flange Adapter, Flange Outside Diameter 5 in, Number of Bolt Holes 4, Flange Thickness 5/16 in, Bolt Hole Diameter 31/50 in