Lovejoy 69790400220 Cast Iron F 4E Hub, Rigid with Center, 4.44" Length Through Bore, 12.5" OD, 12.5 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.