Expansion Joint Bolt Circle Diameter 4 3/4 in Bolt Hole Size 5/8 in Bolt Hole Threading Unthreaded Burst Pressure 900 psi Compression Distance 1 1/2 in Connection Type Flanged Expansion Distance 5/8 in Expansion Joint Type Single Bulb Features Flanges Molded into Body Retaining Rings Flange Diameter 6 in Flange Material Neoprene Flange Material Finish Not Applicable Flange Material Grade Not Applicable Joint Material Neoprene Joint Material Finish Not Applicable