Autolite Genuine Oem Spark Plug - 388

Genuine Autolite replacement part. Thread Size: 18mm, Thread Pitch: 1.5mm, Seat Type: Gasket, Reach: 12.7mm (1/2"). Hex Size: 7/8" (22mm), Terminal Type: Removable Nut. Material: Nickel, Type: Heavy Duty, Projection: Non-Projected. Copper core improves resistance to fouling.