... 005mm------+/-0.02mmSecondary OperationsBending,Brazing,Cross,Drilling,Grinding,Knurling,Laser Cutting,Milling,Slotting,Surface,Grinding,Tapping,Threading,Ultrasonic ... Blasting,Hard Coat Anodizing,Heat-treating,Induction Heat Treating,Laser Etching,Pad Printing.Painting,Parkerizing,Plating,Polishing,Powder ... ,Hardened metal,Precious metal CNC aluminum cylinder with inner threaded in dongguan china