"COUNTERBORE DIAMETER: BOTH ENDS, 2.375 IN. NOMINAL; COUNTERBORE DEPTH: BOTH ENDS, 0.625 IN. NOMINAL; TAPER LENGTH: BOTH ENDS, 1.875 IN. NOMINAL; DISTANCE FROM CENTER OF BORE TO BOTTOM OF KEYWAY: BOTH ENDS, 0.7343 IN. NOMINAL; FLANGE WIDTH: 2.4375 IN. NOMINAL; FURNISHED ITEMS: BOLTS 4, NUTS HEX STD 0.625 IN. 4, NUTS HEX JAM 0.625 IN. 4; TAPER PER FOOT: BOTH ENDS, 0.500 IN. NOMINAL; HUB DIAMETER: 2.750 IN. NOMINAL; 1 KEYING FACILITY PROVIDED EACH END; KEYING FACILITY WIDTH: BOTH ENDS, 0.125 IN. NOMINAL; KEYING FACILITY LENGTH: BOTH ENDS, 1.1875 IN. NOMINAL; DRIVE HALF OF COUPLING HAS A 3.500 IN. DIA BY 0.188 IN. DEEP RECESS ON FACE, DRIVEN HALF OF COUPLING HAS A 3.500 IN. DIA BY 0.125 IN. RAISED BOSS ON FACE"