"ALUMINUM ALLOY QQ-A-225/9 COMP 7075 COND T73,ANODIZEDFINISH PS13201 CL1 TY 2,3.650 IN. DIA,0.960 IN. H,BORE THRU3.400 IN. MIN TO 3.405 IN. MAX DIA,THREE MTG HOLES 0.127 IN. DIAEQUALLY SPACED ON OD FACE,3 SLOTS 0.660 IN. W 0.765 IN. DEEPEQUALLY SPACED 120.0 DEG APART,SHOT PEEN"