Autolite Genuine Oem Spark Plug # 4164

Genuine Autolite replacement part. Thread Size: 12mm, Thread Pitch: 1.25mm, Seat Type: Gasket, Reach: 19mm (3/4"). Hex Size: 11/16" (17mm), Terminal Type: Removable Nut. Material: Nickel, Type: Necked Down, Projection: Projected. Copper core improves resistance to fouling.