... :M3-M22 3Bolt material:Carbon steel 4.Effect:Connection,Fastening Export bolts nutsProducts Details: Products Name: bolts nuts Size: M3-M22 ... Standard NO.: DIN933,DIN931,DIN934 Material:: Carbon steel,stainless steel Grade: 4.8-12.9 Finish: zinc,black,chrome,nickel,yellow ... so on other countries and area. WENZHOU HOWLS FOREIGN TRADE CO.,LTDRm.1106,Digital Mansion,No.140,Xincheng Road,Wenzhou,Zhejiang ...