Champion 845 Copper Plus Non-Resistor Spark Plugs - J17LM

Spark Plug Code: J17LM

Plug Type: J17LM.
Seat Type: Gasket.
Hex Size (Inch): 0.813.
Hex Size (MM): 20.65.
Thread Size (Inch): 0.551.
Thread Size (MM): 14.
Thread Reach (Inch): 0.375.
Taper Diameter (Inch): 0.36.
Installed Height: 1.78.
Gap (Inch): 0.023-0.028.
Gap (MM): 0.58-0.71.
Center Electrode Diameter (Inch): 0.075.
Center Electrode Material: Nickel Copper Alloy.
Ground Electrode Material: Nickel Copper Alloy.
Classification: Champion Copper Plus.
Resistor Plug: N.

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 EMI and RFI suppression. Patented Ultraseal coated shell for rust prevention.