Metal gasket

A metal gasket having an opening on an outer peripheral end, an annular shape in a plane shape, and a horizontal U-shape in a vertical sectional view,

• wherein the metal gasket has an upper section, an inner peripheral section and a lower section,
• wherein a first inclined face toward an inner peripheral direction is formed at a boundary between an upper surface of the upper section and an inner surface of the inner peripheral section, and a second inclined face toward an inner peripheral direction is formed at a boundary between a lower surface of the lower section and an inner surface of the inner surface section, respectively, and the inclined face has an area of a minimum thickness of 3 to 25% of the height of the metal gasket,
• wherein each of the upper section and the lower section has an angular portion having a shape of a mountain in a vertical sectional view, respectively, and each of a height from the upper surface of the upper section to an apex of the angular portion having a shape of a mountain on the upper section, and a height from the lower surface of the lower section to an apex of the angular portion having a shape of a mountain on the lower section is 0.01 mm or more,
• wherein a distance between a lower surface of the upper section and an upper surface of the lower section in the opening is 20 to 90% of the height of the metal gasket,
• wherein an upper apex of the angular portion on the upper section is present in a region between the outer peripheral surface of the inner peripheral section and a first midpoint of the lower surface of the upper section, and
• wherein a lower apex of the angular portion on the lower section is present in a region between the outer peripheral surface of the inner peripheral section and a second midpoint of the upper surface of the lower section.