Plug Specifications : Thread Size: 14mm, Hex Size: 5/8" (16mm), Reach: 19mm (3/4"), Seat Type: Gasket, Gap: .044" (1.1mm), Heat Range: 6, Terminal Type: Solid, Resistor: Yes, Overall Height: ISO, Thread Pitch: 1.25mm, Brand: NGK, ----- Center Electrode : Type: Fine Wire, Material: Iridium, Size: 0.6mm, Projection: Projected, ----- Ground Electrode : Type: Taper Cut, Material: Nickel, Number Of Ground Electrodes: 1