Shell Thread Diameter: 14mm Thread Pitch: 1.25mm Seat Type: Gasket Reach: 19mm (3/4") Hex Size: 5/8" (16mm) Terminal Type: Solid Overall Height: ISO Gap: .043" (1.1mm) Center Electrode Material: Iridium Type: Fine Wire Size: 1.0mm Projection: Projected Ground Electrode Material: Platinum Type: Standard Quantity: 1 Specifications Resistor: Yes Resistor Value: 5k Ohm Heat Range: 6 Torque Specs Cast Iron: 18-25.3 lb. ft. Aluminum: 18-21.6 lb. ft.