Perform the Counter Sinking Operation for the existing Hole 0.098 to 0.103Inch (2.4892 to 2.6162mm) 16 places, to maintain the flushness within +0.010inch(0.254mm),-0.000inch(0.000mm) per BAC5004-1.
For internal quality purpose at all 16 places, maintain the flushness within +0.002inch(0.05MM), -0.000inch(0.000)