"DISTANCE FROM BORE CENTERLINE TO BODY KEYING FACILITY BOTTOM/TOP:1.220"" NOM.; BODY KEYING FACILITY DEP/HT:0.570"" NOM.; THREAD PROVISION:UNTHREADED; KEYING FACILITY QTY:1; HUB OD:4"" NOM.; BORE COUNTERBORE FEATURE:NOT INCLUDED; DISTANCE FROM CENTER OF BORE TO BOTTOM OF KEYWAY:1.375"" NOM.; KEYWAY WD:0.500"" NOM.; FLANGE THICKNESS:1.230"" NOM."