BR6S 3522 NGK Spark Plug

BR6S 3522 NGK Spark Plug.  Compatible with Champion: J8C, J8, RJ8, RJ8C, 823, 841. AC Delco: R43, R44, CR43, M44C, S44. Bosch: W7E, W8E, WR8E, WR9E, WR9EC. Denso: W20S, W20SR-U. Motorcraft: A5C, A5X, AR31, AT4, AZ3.  Common Applications: Small Engines: Lawnmowers, tillers (Tecumseh, Briggs & Stratton). Marine: Older Mercury, Chrysler, OMC outboards. Automotive: Classic GM (Chevy 350 engines in early K10/C10), some AMC.  Specs: Heat Range 6 (standard), thread size 14mm, reach 0.375" (3/8").  Seat:  Gasket.  NGK standard plugs are constructed for longer life and optimum performance. Trivalent metal plating provides superior anti-corrosion and anti-seizing properties. Corrugated ribs prevent flashover. Pure alumina silicate ceramic insulator, provides superior strength and better heat transfer. Copper core aids in heat removal. Triple seals prevent leakage