Autolite (4 Pack) Genuine Small Engine Copper Core Spark Plugs - 2554-4PK

Includes (4) 2554 Spark Plugs. Thread Size: 14mm, Thread Pitch: 1.25mm, Seat Type: Tapered, Reach: 8.4mm (.332"). Hex Size: 5/8" (16mm), Terminal Type: Solid. Material: Nickel, Type: Standard, Projection: Projected. Copper core improves resistance to fouling. . Compatible with the Following: Bosch: 7814, HS7F, Champion: 855, 872, DJ6Y, DJ7Y, RDJ7Y, NGK: 1270, 5950, BM7F, BPM6F, BPMR6F, Torch: N6RTC, N6RTC, N6TC

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