Lovejoy 69790441424 HERCUFLEX FX Series 41424 FX 3.5SM Steel Rigid Hub, 1-7/8" Bore, 6.87" OD, 1/2" x 1/4" Keyway, 4.19" Length Through Bore

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