An internal combustion engine comprising: - a cylinder head; - a cylinder head cover; - an intermediate flange arranged between the cylinder head and the cylinder head cover; - a first opening extending from the cylinder head cover, through the intermediate flange, and into the cylinder head, the first opening includes first internal threads lying inside the cylinder head; - a second opening provided at the end of the intermediate flange which is in contact with the cylinder head, the second opening surrounds the first opening; - a third opening provided at the end of the intermediate flange which is in contact with the cylinder head cover, the third opening surrounds the first opening; - a first bolt, the first bolt includes second internal threads and is integrated inside the second opening; - a second bolt, the second bolt includes third internal threads and is integrated inside the third opening; - a plurality of fasteners for fastening the cylinder head cover and the intermediate flange to the cylinder head, the plurality of fasteners comprising: - a screw, the screw comprising: a head, and a shaft, the shaft includes first external threads and second external threads; characterized in that: - the first internal threads of the first opening receive the first external threads of the shaft of the screw; - the second internal threads of the first bolt receive the first external threads of the shaft of the screw; - the third internal threads of the second bolt receive the second external threads of the shaft; and - the head of the screw rests directly on top of the cylinder head cover when the screw is completely tightened. - a cylinder head; - a cylinder head cover; - an intermediate flange arranged between the cylinder head and the cylinder head cover; - a first opening extending from the cylinder head cover, through the intermediate flange, and into the cylinder head, the first opening includes first internal threads lying inside the cylinder head; - a second opening provided at the end of the intermediate flange which is in contact with the cylinder head, the second opening surrounds the first opening; - a third opening provided at the end of the intermediate flange which is in contact with the cylinder head cover, the third opening surrounds the first opening; - a first bolt, the first bolt includes second internal threads and is integrated inside the second opening; - a second bolt, the second bolt includes third internal threads and is integrated inside the third opening; - a plurality of fasteners for fastening the cylinder head cover and the intermediate flange to the cylinder head, the plurality of fasteners comprising: - a screw, the screw comprising: a head, and a shaft, the shaft includes first external threads and second external threads; characterized in that: - the first internal threads of the first opening receive the first external threads of the shaft of the screw; - the second internal threads of the first bolt receive the first external threads of the shaft of the screw; - the third internal threads of the second bolt receive the second external threads of the shaft; and - the head of the screw rests directly on top of the cylinder head cover when the screw is completely tightened. a head, and a shaft, the shaft includes first external threads and second external threads; characterized in that: - the first internal threads of the first opening receive the first external threads of the shaft of the screw; - the second internal threads of the first bolt receive the first external threads of the shaft of the screw; - the third internal threads of the second bolt receive the second external threads of the shaft; and - the head of the screw rests directly on top of the cylinder head cover when the screw is completely tightened. - the first internal threads of the first opening receive the first external threads of the shaft of the screw; - the second internal threads of the first bolt receive the first external threads of the shaft of the screw; - the third internal threads of the second bolt receive the second external threads of the shaft; and - the head of the screw rests directly on top of the cylinder head cover when the screw is completely tightened.