... treatment, galvanized 4.TS16949;ISO9001 TS16949 Carbon steel galvanized Forged Nut for ConstructionAbout Zhongsheng:Rizhao Zhongsheng Forging ... 42CrMo4, 40CrNiMo, 34CrNi3Mo, 25Cr2Ni4MoV, 18CrNiMo5, 30CrMo, 4130,41405) Gear related forgings:35CrMo, 34CrMo4, 4137, 42CrMo, 4140, SCM440, ... productsToolingEquipmentInspectionOur certificatePackage TS16949 galvanized Carbon steel Forged Nut for Construction