NGK 2420 D9EA Standard Nickel Spark Plug, 12mm, 3/4 in. Reach, Non-Resistor

The NGK 2420 (D9EA) Standard spark plug is a copper-core, nickel-alloy replacement plug. It is built to original-equipment standards and gives reliable ignition in a wide range of engines. This non-resistor plug has a 12mm thread, a 3/4 in. reach and a gasket seat. It is also called a D9EA spark plug or NGK Standard nickel spark plug.

Key Features:

• Solid copper core: Moves heat away from the firing tip quickly and gives a wide usable heat range.
• Nickel alloy electrodes: Provide consistent, reliable sparking.
• Trivalent metal plating: Resists corrosion and seizing, so the plug installs and removes more easily.
• Cold-rolled threads: Help prevent cross-threading and cylinder head damage.
• Alumina silicate ceramic insulator: Gives strength and good heat transfer.
• Triple-seal construction: Helps prevent combustion gas leakage.
• Corrugated insulator ribs: Help prevent flashover.

Specifications:

• NGK stock number: 2420
• NGK part number: D9EA
• Heat range: 9
• Thread diameter and pitch: 12mm x 1.25mm
• Reach: 0.750 in. (19mm)
• Seat type: Gasket (flat seat)
• Hex size: 18mm
• Pre-set gap: 0.028 in. (0.7mm)
• Terminal: Threaded stud
• Center electrode: Non-projected, nickel alloy, copper core
• Resistor: No (non-resistor)

For installation, torque to 10.8-18 lb-ft in cast iron heads or 10.8-14.5 lb-ft in aluminum heads. This plug suits engines that originally came with nickel alloy plugs. It is not recommended for engines that came with factory precious metal plugs. NGK is a leading original-equipment spark plug supplier with decades of ignition experience.