"COPPER ALLOY MIL-C-15345;OD 10.000 IN.;8 HOLES EQUALLY SPACED ON A 9.000 IN. DIA,0.500 IN. FLAT BOTTOM DRILLED 0.562 IN. DEEP,PLUS OR MINUS 0.016 IN.;4 SPLITS 90 DEG ANGLE APART AND 0.010 IN. CLEARANCE;1 HOLE DRILLED.0.375 IN. DIA AND 0.562 IN. DEEP;0.750 IN. GROOVE ON OUTE PERIMETER FOR TOOLING;ID 7.775"