Spark Plug Diagram - How Ignition Works in Internal Combustion Engines #215083 (License: Personal Use)

This high-detail line drawing depicts a standard automotive spark plug, featuring a hexagonal nut for installation, a ceramic insulator, metal shell with threading, and a central electrode surrounded by a grounded side electrode. A stylized lightning bolt at the tip visually represents the high-voltage spark that initiates combustion in internal combustion engines. The UGC logo on the body suggests a branded or certified component.

Used on automotive repair guides, engine maintenance pages, educational content about internal combustion systems, and product pages for ignition parts; matches user intent for understanding or diagnosing spark plug function, replacement, or failure symptoms.