Autolite Copper Non-Resistor Spark Plug

Autolite Copper Non-Resistor Spark Plug
Autolite Copper Non-Resistor Spark Plug


The Autolite Copper Spark Plug has traditional nickel electrodes and its copper core improves resistance to fouling. The power tip extends further into the combustion chamber to aid in self-cleaning, reducing fouling at low RPM's, and pre-ignition at high speeds. It has a 1/2" reach surface gap plug specifically designed for high lift Flathead engine applications.


  • Guaranteed to deliver quick starts, good fuel economy and smooth acceleration.
  • Copper core center electrode for higher thermal conductivity.
  • Specially engineered high nickel alloy center and ground electrode for extended life.
  • High alumina ceramic for high dielectric strength.
  • Leak proof, heat fused internal seal for durability.
  • Multi-rib insulator prevents flash-over.


Ground Electrode Tip Design:Tapered
Ground Electrode Core Material:Nickel
Electrical Terminal Type:Stud
Center Electrode Core Material:Copper
Center Electrode Tip Material:Nickel
Pre-Gap Size:0.050", 1.3 mm
Ground Electrode Quantity:1
Hex Size:13/16", 21mm
Seat Type:Flat
Reach:0.500", 13.0mm
Thread Diameter:14.0mm
Resistor Type:No
Center Electrode Design:Standard/Regular
Ground Electrode Tip Material:Nickel
Insulator Material:Ceramic
Insulator Type:Surface Gap