Engine bolt 1,Dia:M10*1.25 2,Length: 86MM 3,Material:35CrMo,42CrMo4 4,Engine bolt factory Cylinder head boltCylinder head bolt which connect cylinder head with cylinder block.Good hardness with long using lifeMaterial as customer's request(35CrMo,40Cr,,42CrMo..)Total length: 86MMDiameter: M10*1.25 Displacement:1000CC Offer various kinds of cylinder head boltsTech requirement:phosphating on the ...