Autolite Genuine Small Engine Copper Core Spark Plug - 303

Genuine Autolite replacement part. Thread Size: 14mm, Thread Pitch: 1.25mm, Seat Type: Gasket, Reach: 9.5mm (3/8"). Hex Size: 13/16" (21mm), Terminal Type: Removable Nut, Gap:.031" (0.8mm). Material: Nickel, Type: Standard, Projection: Non-Projected. Copper core improves resistance to fouling.