Shell Thread Diameter: 12mm Thread Pitch: 1.25mm Seat Type: Gasket Reach: 26.5mm (1.04") Hex Size: 5/8" (16mm) Terminal Type: Solid Overall Height: ISO Gap: .035" (0.9mm) Center Electrode Material: Iridium Type: Fine Wire Size: 0.6mm Projection: Extended Projection Ground Electrode Material: Platinum Type: Standard Quantity: 1 box Specifications Resistor: Yes Resistor Value: 1K Ohm Heat Range: 7 Features: Extended Shell Torque Specs Cast Iron: 10.8-18 lb. ft. Aluminum: 10.8-14.5 lb. ft.