... . material:Carbon steel,Alloy steel,stainless steel2. grade of HEX BOLT:Metric standerd: Grade4.6, Grade4.8, Grade5.6, Grade5 ... ,Nickel,phosphate 6lack,DACRO coating,ect.7. Packing of HEX BOLT :Generral packing 15-25Kg per Caton or Bag.approx ... ,black,dacroment etc.ColorNatural color,zinc color,blackSuperiorityEco-friendly,high tensile,lso,Rohs certificate Thread sizeM4M5M6M8M10M12M14Pitch0.70.811.251. ...