Lubricating coating composition and attachment component for internal combustion engine

An internal combustion engine attachment component to be attached to an exhaust pipe of an internal combustion engine, characterized in that

• the component has a screw member having a threaded portion, and, a coating film formed on a surface of the threaded portion, the coating film being formed of solid ingredients of a lubricating coating composition;
• and
• the composition comprises, as the solid ingredients for forming the coating film, an organosilicon polymer having a polycarbosilane skeleton cross-linked by a metallic element, and a solid lubricant composed of at least one member selected from among molybdenum disulfide, boron nitride, graphite, and mica, and an organic solvent serving as the solvent for the solid ingredients,
• wherein an under layer treatment is administered to the threaded portion of the screw member where the coating film will be formed to enhance adhesion of the coating film, and
• the composition is applied onto the surface of the treated threaded portion of the screw member and the solid coating film is formed by drying or heating the applied composition.