NGK 3961 BR8ES Spark Plug

NGK standard plugs are constructed for longer life and optimum performance.

• Trivalent metal plating provides superior anti-corrosion and anti-seizing properties
• Corrugated ribs prevent flashover
• Pure alumina silicate ceramic insulator, provides superior strength and better heat transfer
• Copper core aids in heat removal
• Triple seals prevent leakage

NGK #s:

• BR8ES
• 3961

UPC:

• 087295139615

Shell

• Thread Diameter: 14 mm
• Thread Pitch: 1.25 mm
• Seat Type: Gasket
• Reach: 19 mm (3/4")
• Hex Size: 13/16" (21mm)
• Terminal Type: Solid
• Overall Height: ISO
• Gap: .031" (0.8 mm)

Center Electrode

• Material: Nickel
• Type: Standard
• Size: 2.5 mm
• Projection: Non-Projected

Ground Electrode

• Material: Nickel
• Type: Standard
• Quantity: 1

Specifications

• Resistor: Yes
• Resistor Value: 5k Ohm
• Heat Range: 8
• Torque Specs: Cast Iron: 18-25.3 lb. ft. / Aluminum: 18-21.6 lb. ft.
• Longevity: 30k Miles