Figure 6: Recommended housing bore chamfers (shouldered bore)
Chinese spark plug manufacturers adhere to stringent quality control measures to ensure that their products meet industry standards and specifications. Advanced manufacturing processes, precision engineering, and rigorous testing protocols are employed to produce high-quality spark plugs that deliver reliable performance and durability. Manufacturers prioritize material quality, heat resistance, and electrode design to optimize the spark plug's ignition capabilities and longevity.

metal cased oil seals. They can be used with a wide range of oils, greases, and other lubricants, making them suitable for various industrial applications. Additionally, these seals can withstand exposure to harsh chemicals, extreme temperatures, and abrasive materials without compromising their sealing capabilities.
MVQ
H7 or H8
2. If the nominal bore diameter exceeds 400 mm:
H7

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