... :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 ... , please contact me.3.Main Makets: Our company's major export markets in North America,South America,Eastern Europe,Southeast Asia ...