Split Flange Kit Flange Material Steel Flange Material Finish Zinc-Plated Flange SAE Code 61 Maximum Operating Pressure 3 000 psi Nominal Flange Size 1/2 in O-Ring Material Buna-N Bolt Hole Center-to-Center Height 0.68 in Bolt Hole Center-to-Center Width 1.5 in Bolt Hole Size 0.34 in Includes (2) Bolts Both Flange Halves O-Ring Washers Maximum Operating Temperature 250 Degrees F Minimum Operating Temperature -40 Degrees F