Expansion Joint Bolt Circle Diameter 7 1/2 in Bolt Hole Size 5/8 in Bolt Hole Threading Unthreaded Burst Pressure 900 psi Compression Distance 3/4 in Connection Type Flanged Expansion Distance 1/2 in Expansion Joint Type Single Bulb Features Flange Rings Flange Diameter 9 in Flange Material Steel Flange Material Finish Zinc-Plated Flange Material Grade Not Applicable For Fluid Type Food Grade for Fluids and Solids Low Velocity Joint Material EPDM