"DISTANCE FROM CENTER OF BORE TO BOTTOM OF KEYWAY: FIRST END, 1.312 IN. NOMINAL, AND SECOND END, 0.937 IN. NOMINAL; FLANGE WIDTH: 3.335 IN. NOMINAL; HUB DIAMETER: 7.906 IN. NOMINAL; 1 KEYING FACILITY INCLUDED AT EACH END; KEYING FACILITY WIDTH: FIRST END, 0.500 IN. NOMINAL; SECOND END, 0.375 IN. NOMINAL; KEYING FACILITY LENGTH: BOTH ENDS, 4.187 IN. NOMINAL"