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Champion M14 Spark Plug RN79G Sales part numbers: 530, 642 Material: center electrode - copper-cored nickel with Iridium SuppressorShielding: Sac-9 Ground electrode: Goldpalladium fine wire Shell thread: 14 mm Terminal thread nut: threaded with knurl Reach (inch): 0.75 Hex (inch): 0.813 Available gap (inch): 0.0230 - 0.0280 Reach (mm): 19.05 Hex (mm): 20.65 Available gap (mm): 0.5842 - 0.7112 Core nose length (inch): 0.268 Electrode max. operating temperature (F): 1700 F Overall length: 3 in.
Federal-Mogul Corporation