Schematic
Heat Transfer
High-Thread vs Conventional
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Autolite's revolutionary new 10mm HT or "High-Thread" design offers more power by placing the threads above the cylinder head seating for a more compressive seal and to provide more space to optimize engine design, incorporating a one-piece ground shield strap for improved heat transfer, and using a patented fine wire design for more focused ignition power. Autolite's HT design also offers more durability by using an improved resistor for longer service life, a nickel-plated shell for improved corrosion protection, and no gapping is required.
High-Thread design has no areas of concentrated or restricted heat transfer. Provides for more stable spark plug operating temperature, which would be less likely to result in pre-ignition during non-normal combustion events, such as detonation.
The High-Thread plugs require a 9/16" socket wrench to install.
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