Hex bolt/Center bolt with nuts Reasonable Price with Excellent Quality&Finishing. Center bolts,Hex bolts,Center bolt with nut. Specification 1) Grade:Ordinary standard 10.9(Or as required) 2) Material: Mild steel, (45#)ASTM 1045 steel,(40CR)ASTM 5140 steel3) Finishing:Black Oxide, Zinc Plated, Phosphate, Electrophoresis,Dacromet,ect.4) Diameter&Length can be as required,Metric and Imperial ...