Lovejoy 69790400564 Cast Iron F 5.5 Hub, Rough Stock Bore, 6.19" Length Through Bore, 10.5" OD, 573300 Inch Pounds Item Torque

                For use with F (Flex-Flex) or FFR (Flex-Rigid) couplings. Exposed bolts are the standard design. F Type coupling consists of two flex hubs, two sleeves, and one accessory kit.