Compare Maximum number of 4 items selected Autolite Platinum Spark Plug - AP5263 Part #: AP5263 Line: ATO Autolite Platinum Spark Plug 4 Year Limited Warranty Seat: Tapered Thread Size: M14-1.25 Heat Range: 11 Hex Size (mm): 16mm Hex Size (in): 5/8 Inch Preset Gap (in): 0.040 Inch Preset Gap (mm): 1.02mm Thread Reach (in): 0.982 Inch Center Electrode Core Material: Nickel Center Electrode Tip Material: Platinum Approximate Resistor Value (Ohm): 4000 Ohm Insulator Height (mm): 55.7mm Insulator Height (in): 2.192 Inch Ground Electrode Tip Material: Nickel Thread Reach (mm): 24.94mm Metallurgy: Platinum Show More Show Less