Autolite (4 Pack) Genuine Small Engine Copper Core Spark Plugs # 456-4PK

Includes (4) 456 Spark Plugs. 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:.026" (0.65mm). Material: Nickel, Type: Standard, Projection: Non-Projected. Copper core improves resistance to fouling. . Compatible with the Following: Bosch: 7803, W8E, W9EC0, Champion: 845, 856, J17LM, J19LM, RJ17LM, NGK: 3410, 4133, 6150, B4LM, B4LMY, BR4LM, CS4, Torch: GL4

Copper-glass seal bonds insulator, terminal post, and center electrode together to provide a tight seal that is 100 percent leak-proof Cold-formed steel shell and precision rolled threads, with one-piece terminal post to add strength Multi-rib insulator reduces danger of "flash-over" Resistor reduces radio frequency interference (RFI) and electrode erosion Full copper core electrode provides better performance in all conditions