"COPPER ALLOY,MIL-B-16540 GR A; 11.000 IN. OD; 7.550 IN. MIN AND 7.570 IN. MAX ID; 0.945 IN. HT; EIGHT HOLES 0.218 IN. DIA BY 0.160 IN. DEEP EQUALLY SPACED ON AN 8.490 IN. MIN AND 8.510 IN. MAX BCD; ONE HOLES 0.178 IN. MIN AND 0.186 IN. MAX DIA,CSK TO 0.335 IN. MIN AND 0.345 IN. MAX DIA; SECOND STEP THREADED 9.750-16BS 3A"