Shop Pack of 25 Genuine Spark Plug NGK 1098 B7HS10 was NGK 704 B7HS10/S25

Shell
Thread Diameter: 14mm
Thread Pitch: 1.25mm
Seat Type: Gasket
Reach: 12.7mm (1/2")
Hex Size: 13/16" (21mm)
Terminal Type: Removable Nut
Overall Height: ISO
Gap: .039" (1.0mm)

Center Electrode
Material: Nickel
Type: Standard
Size: 2.5mm
Projection: Non-Projected

Ground Electrode
Material: Nickel
Type: Standard

Specifications
Resistor: No
Resistor Value: 1K Ohm
Heat Range: 7
Torque Specs: Cast Iron: 18-25.3 lb. ft. Aluminum: 18-21.6 lb. ft.