This cylinder head stud is designed for a classic Citroën model. The stud provides a secure connection between the cylinder head and the engine block. Its metric thread and length match the requirements of the engine design. The stud distributes clamping force around the cylinder head and helps limit leakage of combustion gases and coolant. The material is suitable for changing temperatures and loads in the engine area. The stud is used during engine service and overhaul when existing fasteners are worn, damaged, or no longer meet the technical needs of reliable engine operation under normal driving conditions.