... :500 pcs Precision CNC machining stainless steel thread shaft Itemtopicdetails1materialstainless steel:303,304,316,420,630,3Cr13,4Cr13,420J2;carbon steel:1008,1018 ... shift .step 6OQCQC must inspect product before shipment .Equipped with over 100 sets of CNC and punching machines , ... on R&D of precision CNC machining parts and keeps improvingworkmanship and product quality.With the optimum cost control, ...