... 2.Bolt size:M3-M22 3Bolt material:Carbon steel 4.Effect:Connection,Fastening Export carbon steel hex bolt and nut Products Details ... nut Size: M3-M22 Standard NO.: DIN933,DIN931,DIN934 Material:: Carbon steel,stainless steel Grade: 4.8-12.9 Finish: zinc ... FOREIGN TRADE CO.,LTDRm.1106,Digital Mansion,No.140,Xincheng Road,Wenzhou,Zhejiang,ChinaCompany Website URL:http://www.wzhowl.comFax:0086 ...