We offers cylinder head bolt,head bolt,screw.

 Consider this: the head bolts have to withstand tremendous loads to keep the cylinder head sealed tightly against the head gasket and block. In an engine with four inch cylinder bores and peak combustion pressures of around 1,100 pounds per square inch, each cylinder exerts about 13,827 lbs. of pressure against the cylinder head at full throttle. In fact, head bolts may have to handle loads of more than five tons per bolt at wide-open throttle!