Center Electrode Core Material - Copper, Center Electrode Tip Material - Ni, Electrode Gap (0.7 mm), Ground Electrode Material - Ni, Hex Size (20.6 mm), Seal Seat, Thread Diameter (14mm), Thread Length (19mm), Thread Pitch (1.25mm), Tightening Angle -1/2 turn, Tightening Torque (Nm) - 20-382