NGK 3112 B-4L Standard Copper Core Spark Plug, 14mm, Heat Range 4

The NGK 3112 (B-4L) Standard Spark Plug is a nickel-alloy, copper-core spark plug built to OE specifications for reliable ignition and smooth combustion. NGK Standard plugs suit engines originally equipped with nickel-alloy plugs. They are not recommended where the factory plug is a precious-metal type.

Key Features:

• Solid copper core for heat dissipation, conductivity and a wide heat range
• Nickel center and ground electrodes, with a non-projected insulator tip
• Trivalent metal plating resists corrosion and seizing, which makes installation and removal easier
• Cold-rolled threads help prevent cross-threading and cylinder head damage
• High-grade alumina silicate ceramic insulator with corrugated ribs to reduce flashover
• Triple gasket sealing prevents combustion gas leakage

Specifications:

• NGK stock number: 3112
• Part/service number: B-4L
• Heat range: 4
• Thread size: M14 x 1.25 (14 mm diameter)
• Reach: 0.460 in (11.2-11.6 mm)
• Hex size: 13/16 in
• Seat type: Flat, with gasket (crush washer)
• Pre-set gap: 0.028 in (0.7 mm)
• Terminal: Removable nut
• Resistor: No
• Ground electrodes: 1

NGK is a leading OE spark plug supplier for domestic and import vehicles, with decades of experience in automotive, motorcycle, marine and small engine applications. The B-4L is a dependable replacement spark plug for ignition tune-ups and maintenance.