Expansion Joint Bolt Circle Diameter 6 in Bolt Hole Size 5/8 In.-11 Bolt Hole Threading Threaded Burst Pressure 853 psi Compression Distance 1/2 in Connection Type Flanged Expansion Distance 3/8 in Expansion Joint Type Single Bulb Features Absorbs Pipe Movement and Stress Flange Diameter 7 1/2 in Flange Material Steel Flange Material Finish Zinc-Plated For Fluid Type Air Water Joint Material EPDM Joint Material Finish Not Applicable Joint Material Grade Not Applicable