Patent ID: 9194494
Filing Date: 2015-11-24
Classification: F16J,H01L,H01T

Abstract:
1. A spark plug comprising: a tubular metallic shell extending in an axial direction; and an annular gasket defining a hole that extends through the annular gasket from an upper surface to a lower surface, the annular gasket provided around the metallic shell, the spark plug being characterized in that: the gasket is solid and contains copper as a main component and nickel in an amount of 0.10 wt. % to less than 0.80 wt. %; the gasket has a maximum thickness of 0.4 mm or more in the axial direction; the gasket has a Vickers hardness of 30 HV to 150 HV; and the upper surface of the gasket is in contact with the metallic shell and has an area of 92 mm