1-3/64 INCH OAL, 3/16 INCH X 3/32 INCH KEYWAY WIDTH X DEPTH, 3/4 INCH MAX BORE DIAM, 3-1/4 INCH HUB, 5 FLEXIBLE COUPLING FLANGE 3-1/4 INCH OD, SINTERED STEEL, TYPE J; Part Number: 5J34; Category: Motors/GearBox/Clutch; Subcategory: Shaft Coupling