... material:Carbon steel 4.Effect:Connection,Fastening Export bolts nutsProducts Details: Products Name: bolts nuts Size: M3-M22 Standard NO.: DIN933 ... .8-12.9 Finish: zinc,black,chrome,nickel,yellow Quality: High-quality raw material, strict inspection Product features: Features of fastening ... , we manage to provide our customers with the highest quality, the best service and the most reasonable value by ...