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

• Thread Diameter:  14mm
• Thread Pitch:  1.25mm
• Seat Type:  Gasket
• Reach:  12.7mm (1/2")
• Hex Size:  13/16" (21mm)
• Terminal Type:  Solid
• Overall Height:  ISO
• Gap:  .050" (1.3mm)

• Center Electrode
• Material:  Tungsten
• Type:  Standard
• Size:  2.5mm
• Projection:  Non-Projected

• Ground Electrode
• Material:  Nickel
• Type:  Surface Discharge

• Specifications
• Resistor:  No
• Resistor Value:  1K Ohm
• Heat Range:  12
• Features:  Booster Gap
• Torque Specs:  Cast Iron: 18-25.3 lb. ft. Aluminum: 18-21.6 lb. ft.