NGK Standard Spark Plug 6431 - BU8H

Surface Gap Plugs are Nearly Immune to Pre-Ignition, and Usually Require a Special High Energy Ignition System. They Can be Susceptible to Fouling, Especially in Colder Applications, but May be Necessary in High Compression Applications.

• 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
• Sold individually

Features

• Solid Terminal
• Semi-Surface Discharge
• Corrugated Ribs
• Copper Core

Shell

• Thread Size: 14mm
• Thread Pitch: 1.25mm
• Seat Type: Gasket
• Resistor: No
• Reach: 12.7mm (1/2")
• Hex Size: 13/16" (21mm)
• Terminal Type: Solid
• Overall Height: ISO
• Gap:. 016" (0.4mm)

Center Electrode

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

Ground Electrode

• Material: Nickel
• Type: Surface Discharge

Specifications

• Torque Specs: Cast Iron: 18-25.3 lb. ft. Aluminum: 18-21.6 lb. ft.
• Brand: NGK
• Heat Range: 8
• Longevity: 30k

Note: Image for reference only, actual product may vary.