NGK Platinum Plug Number LTR5GP Spark Plug - 5019 Part #: 5019 Line: NGK NGK Platinum Plug Number LTR5GP Spark Plug 1 Year Limited Warranty Seat: Tapered Thread Size: M14-1.25 Heat Range: 5 Hex Size (mm): 16mm Hex Size (in): 5/8 Inch Preset Gap (in): 0.040 Inch Preset Gap (mm): 1mm Thread Reach (in): 0.984 Inch Center Electrode Core Material: Copper Center Electrode Tip Material: Platinum Approximate Resistor Value (Ohm): 5000 Ohm Insulator Height (mm): 52.5mm Insulator Height (in): 2.070 Inch Thread Reach (mm): 25mm Service Number: LTR5GP Metallurgy: Platinum Show More Show Less