"BORE IS THD 6.000-12 UNS-3B; HOLE IN HUBS ARE 0.750 IN. CENTER TO END; HUB DIA 2.000 IN.; RAISED LIP HAS 10.000 IN. DIA AND 0.500 IN. WIDE; CENTER 15.000 IN. HAS 6 EQUALLY SPACED SLOTS WITH A 1.250 IN. RADIUS; COUNTERBORE DIAMETER: BOTH ENDS, 6.509 IN. NOMINAL; COUNTERBORE DEPTH: BOTH ENDS, 2.500 IN. NOMINAL, NICKEL-BRONZE-ALUMINUM BODY"