NGK Spark Plug BU8H (6431)

 NGK Standard Spark Plug BU8H​ / 6431 (replays SF-24)

NGK Standard spark plugs are OE approved and recommended for reliable performance for most automotive and non-automotive applications. NGK Standard spark plugs feature a 5-Rib insulator design to prevent flashover and are also treated with corrosion-resistant plating to ensure ease of installation and removal. Cold rolled threads prevent damage to cylinder head. NGK's triple gasket sealing process virtually eliminates gas leakage past the shell. Solid Copper Core provides superior heat dissipation, conductivity and a broader heat range.

• Cold rolled threads - prevents damage to cylinder head

• Triple gasket sealing process - virtually eliminates gas leakage past the shell

• Solid Copper Core - provides superior heat dissipation, conductivity and a broader heat range

• Trivalent Plating - three step plating process utilizing silver chromate and zinc ensures maximum corrosion resistance

Product Features:​

• External Thread (Mm): 14.0mm

• Key Opening: 20,8 mm

• Spark Plug: with flat sealing seat /  SAE connection / No antiparasitic protection / Nickel center electrode

• Thread Length: 12,7 mm

• Spark Position: 0.3 mm

Originals:

• MERCURY: 136 86 B2

• MERCURY: 136 86 Q