NGK Ruthenium HX is designed for newer engines which demand high ignitability. Projected Square Platinum Electrode (PSPE) design promotes spark energy concentration and ignites a wider range of air-fuel ratios, offering improved performance in rich or lean engine conditions. 0.4mm Ruthenium alloy fine wire center electrode and 0.8mm platinum fine wire ground electrode. Trivalent metal platinum 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.
 
Thread Diameter 12mm
Thread Pitch 1.25mm
Seat Type Gasket
Reach 26.5mm (1.04")
Hex Size 9/16" (14mm)
Terminal Type Solid
Gap .031" (0.8mm)
Center Electrode Material Ruthenium
Type Fine Wire Size 0.6mm
Projection Extended Projection
Ground Electrode Material Platinum
Type Projected Square
Quantity 1
 
Specifications
Resistor Yes
Resistor Value 5k Ohm
Heat Range 8
 
Torque Specs
Cast Iron: 10.8-18 lb. ft. Aluminum: 10.8-14.5 lb. ft.