... Thread Stainless Steel Tapered Rod Details: Material 301, 302, 303, 304, 304L, 316, 316L,8620,4140 etc.Surface TreatmentPolishing, Powder coating, Spraying, Anodising, Zinc ... Plating,Chrome Plated, Teflon and etc Tolerance+/-0.02~0.05mmEquipmentsa) CNC ...