"MATERIAL:MANGANESE BRONZE; DISTANCE FROM BORE CENTERLINE TO BODY KEYING FACILITY BOTTOM/TOP:0.875"" NOM.; BORE COUNTERBORE FEATURE:NOT INCLUDED; KEYING FACILITY QTY:1; HUB OD:4.500"" NOM.; THREAD PROVISION:UNTHREADED; DISTANCE FROM CENTER OF BORE TO BOTTOM OF KEYWAY:0.875"" NOM.; KEYWAY WD:0.250"" NOM.; FLANGE THICKNESS:1.330"" NOM."