Grid Coupling Hub System of Measurement Inch Screw Thread Size M8 Outside Diameter 3.44 in Features Design Flexibility Horizontally Split Cover Stop Lug in Cover Prevents Spinning During Reversing Service Maximum Torque 8 798 in-lb For Misalignment Type Angular Parallel Included Screws Set Screw Bore Type Round with Keyway Application For Limited Space General Purpose Maximum Speed 4 125 RPM Standards AGMA Bore Diameter 2 1/2 in Weight 4.9 lb Length through Bore 3 in