... ISO9001:2008; Tolerance:+/-0.0001mm ECO-material stainless steel piston pin bushing with screw thread Specifications:1 ... fineness instruments for inspection, EDM, high speed CNC machine, Sodick wire EDM, etc. 3)Quality control equipments: roundness meter, ... grown into a professional manufacturer, supplying Stainless Steel Axis centers, High-precise Stainless Steel products, Pins made of Iron, Copper ...