Autolite AP45 Platinum Spark Plug

Shell
Thread Diameter: 18mm
Thread Pitch: 1.5mm
Seat Type: Tapered
Reach: 11mm (7/16")
Hex Size: 13/16" (21mm)
Terminal Type
Solid
Gap: .043" (1.1mm)

Center Electrode
Material: Platinum
Type: Necked Down
Projection: Projected

Ground Electrode
Material: Nickel
Type: Standard

Specifications
Resistor: Yes
Resistor Value: 4k Ohm
Heat Range: 2
Torque Specs: Cast Iron: 15-20 lb. ft. Aluminum: 15-20 lb. ft.

Part Information
Brand: Autolite
Longevity: 50k Miles