Plug Type: RA8HC.
Seat Type: Gasket.
Hex Size (Inch): 0.625.
Hex Size (MM): 15.88.
Thread Size (Inch): 0.472.
Thread Size (MM): 12.
Thread Reach (Inch): 0.75.
Taper Diameter (Inch): 0.2.
Installed Height: 1.99.
Insulator Projection (Inch): 0.03.
Gap (Inch): 0.022-0.028.
Gap (MM): 0.56-0.71.
Center Electrode Diameter (Inch): 0.1.
Center Electrode Material: Nickel Copper Alloy.
Ground Electrode Material: Nickel Copper Alloy.
Classification: Champion Copper Plus Small Engine.
Resistor Plug: Y.
Copper Plus spark plug has a copper core center electrode that allows for accurate control of heat range, optimizing performance, and longevity of the spark plug. Patented SAC-9 semi-conductor resistor for maximum and suppression. Patented Ultraseal coated shell for rust prevention.
