"1.680 IN. MAX 1.640 IN. MIN LG,0.640 IN. MAX 0.610 IN. MIN DIA,1 HOLE DRILL THRU TWO WALLS 0.128 IN. MAX 0.124 IN. MIN DIA,1 HOLE DRILL THRU 2 WALLS 0.097 IN. MAX 0.093 IN. MIN DIA,LARGE END THREAD 0.375-24 UNF-3A SPEC MIL-S-7742,SMALL END THREAD 0.250-28 UNF-3A SPEC MIL-S-7742"