Expansion Joint Bolt Circle Diameter 8 1/2 in Bolt Hole Size 3/4 In.-10 Bolt Hole Threading Threaded Burst Pressure 853 psi Compression Distance 2 in Connection Type Flanged Expansion Distance 1 3/8 in Expansion Joint Type Double Bulb Features Absorbs Pipe Movement and Stress Flange Diameter 10 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