This is a A-B1CMR4H NGK Spark Plug, Individually Boxed NGK5246 PN: B1CMR4HMain Description As Following : A-B1CMR4H NGK Spark Plug, Individually Boxed NGK5246 PN: B1CMR4H Found in Section & Models : Sunbelt - Electrical > Spark Plugs, NGK (UNDEFINED): SEVERAL Associated Items : New Also This is An Aftermarket Product And : 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 NGK CMR4H Spark Plug Fits Stihl Replaces Bosch USR7AC to fit 4 Stroke. Thread Pitch: 1.25mm Seat Type: Gasket Hex Size: 13/16" (21mm) Torque Specs: Cast Iron: 18-25.3 lb. ft. Aluminum: 18-21.6 lb. ft. Material: Nickel Quantity: 10 Replaces: Bosch USR7AC Thread Size: 14mm Type: Standard
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