Lovejoy 69790442171 HERCUFLEX FX Series 42171 FX 4E Steel Rigid Hub, Length Through Bore 4.75", 2-1/4" Bore, 8.10" OD, 1/2" x 1/4" Keyway

                The Hercuflex coupling has increased nominal torque, larger maximum bore size and longer service life. It is interchangeable with standard AGMA flange interface.