Description:
The Champion Copper Plus N5C Spark Plug is designed to deliver dependable ignition performance, accurate heat control, and long-lasting durability. Featuring a copper core center electrode, this spark plug provides improved conductivity and efficient heat transfer to help reduce wear and extend service life.
As part of the Champion Copper Plus Small Engine line, the N5C is built as an OE-type replacement plug for compatible engines. It helps resist fouling for more reliable operation, while its corrosion-resistant construction supports long-term durability in demanding conditions. Manufactured to ISO and SAE standards, it offers proven performance across a broad range of automotive, industrial, and small engine applications.
With a flat seat, crush washer, and removable nut terminal, the N5C is a dependable replacement choice for engines requiring this traditional gasket-seat plug design.
Features:
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Copper Plus design for dependable performance and durability
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OE-type replacement spark plug
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Copper core center electrode improves conductivity and heat control
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Helps resist fouling for reliable ignition performance
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Superior corrosion resistance for longer service life
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Built to ISO and SAE standards for proven performance
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Flat seat with crush washer for secure installation
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Removable nut terminal for flexible connection options
Product Specifications:
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Part number: 120
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Plug type: N5C
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Classification: Champion Copper Plus Small Engine
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Grade type: Standard Replacement
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Part description: Spark Plug
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Center electrode tip material: Nickel
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Center electrode design: Standard
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Center electrode diameter: 0.1 in
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Ground electrode material: Nickel copper alloy
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Ground electrode core material: Nickel
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Ground electrode tip material: Nickel
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Ground electrode quantity: 1
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Pre-gap size: 0.026 in / 0.64 mm
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Hex size: 0.813 in / 20.650 mm
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Seat type: Flat
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Reach: 0.75 in
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Thread diameter: 0.551 in / 14.000 mm
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Resistor type: No
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Washer included: Yes
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Washer type: Crush
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Electrical terminal type: Removable Nut
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Manufacturer heat range: 5
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Indexed: No
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Hex type: Hex
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Subject to Prop 65: No
Fitment:
The supplied application list shows broad fitment across many classic automotive and specialty applications, including select models from:
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Alfa Romeo, Allard, Alvis, Armstrong-Siddeley, Arnolt-MG, Austin, Austin Healey
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BMW, Bentley, Berkeley, Bugatti
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Chevrolet, Dodge
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Elva
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Fargo
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GMC
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Healey, Hillman, Humber
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International
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Jaguar, Jensen
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Lanchester, Lancia, Land Rover, Lotus
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MG, Metropolitan, Morgan, Morris
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NSU, Nissan
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Porsche
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Renault, Riley, Rolls-Royce, Rover
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Singer, Standard, Sunbeam
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TVR, Triumph
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Vauxhall, Volkswagen
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Wolseley
Because the user supplied a detailed fitment chart, that complete application data should remain with the product listing for lookup accuracy.