"MATERIAL,ALUMINUM ALLOY,COMPOSITION 6061,TEMPER T6,QQ-A-250/11,0.0500 IN. THK,HEAT TREAT PER BPS4139,FSCM 97499,FINISH PER 206-947-002,FSCM 97499,CIRCULAR SHAPE W/ FOUR EARS ON 9.016 IN. NOM DIA O/A,FOUR HOLES,0.060 IN. MIN 0.093 IN. MAX DIA,FOUR HOLES 0.278 IN. MIN,0.288 IN. MAX DIA FOR ATTACHMENT,EACH EAR 1.755 IN. NOM LG FROM 7.730 IN. NOM CIRCLE DIA,0.050 IN. NOM THK STOCK"