CRES PER EMS-544 COMP 17-4PH OR QQ-S-763 TY 416;ELECTROLESS NICKEL PLATE O/A EXCEPT SERRATIONS;HEAT TREAT ROCKWELL C35 TO C45;125 AA MICROINCH SURFACE FINISH;1.280 IN. LG BY 0.500 IN. THK O/A;0.1925 IN. DIA HOLE THRU ONE END;23 INTERNAL SERRATION ON OTHER END W/0.3823 IN. MAJOR DIA 45.0 DEG PRESSURE ANGLE BY 0.02454 MIN CIRCULAR PITCH BY 0.04909 MAX. CIRCULAR PITCH BY 0.460 IN. LG