"DISTANCE FROM CENTER OF BORE TO BOTTOM OF KEYWAY: FIRST END, 1.532 IN. NOMINAL; SECOND END, 1.594 IN. NOMINAL; FLANGE WIDTH: 1.625 IN. NOMINAL; FURNISHED ITEMS: 4 SETSCREWS; HUB DIAMETER: 2.500 IN. NOMINAL; 1 KEYING FACILITY FURNISHED EACH END; KEYING FACILITY WIDTH: FIRST END, 0.312 IN. NOMINAL; SECOND END, 0.250 IN. NOMINAL"