"DISTANCE FROM CENTER OF BORE TO BOTTOM OF KEYWAY: 1.1870 IN. NOMINAL FIRST END AND 0.781 IN. NOMINAL SECOND END; FLANGE WIDTH: 2.861 IN. NOMINAL; HUB DIAMETER: 6.875 IN. NOMINAL; 1 KEYING FACILITY INCLUDED AT EACH END; KEYING FACILITY WIDTH: FIRST END, 0.500 IN. NOMINAL, SECOND END, 0.312 IN. NOMINAL"