| 摘要 |
A gasket for attaching a spark plug to an internal combustion engine, the gasket having an annular portion. The annular portion is annular to surround the spark plug, and has contact surfaces on both axial ends, one of the contact surfaces being to contact the spark plug, the other being to contact the internal combustion engine. The annular portion is composed of copper alloy containing aluminum oxide. The aluminum oxide content of the copper alloy is 0.3 wt % or more, and 0.7 wt % or less. |
