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Copper/nickel resistor spark plug with 14 mm thread, gasket seat, 0.750 in / 19.05 mm reach and 0.050 in / 1.30 mm pre-gap.
Autolite 646 Copper
646
$4.75
Tax included
| Delivery within 2-3 business days
Copper/nickel resistor spark plug with 14 mm thread, gasket seat, 0.750 in / 19.05 mm reach and 0.050 in / 1.30 mm pre-gap.
Copper-core spark plug with nickel electrode tip for engines requiring a 14 mm thread, gasket seat and longer thread reach. The larger 13/16” hex is common on many older cylinder heads.
Application / fitment
Fits selected Cadillac 368 / 425 / 500 cubic inch V8 applications and selected Chrysler, Dodge, Plymouth and Eagle engines including 3.0 V6 and 2.0 L4 applications. Also appears in selected Buick, Oldsmobile, Pontiac, Asuna and Passport applications where a 14 mm gasket-seat plug with 0.75” reach is specified.
- application: selected Cadillac V8 and selected Chrysler / Dodge / Plymouth / Eagle engines
- spark plug type: standard copper/nickel
- thread: 14 mm
- seat: gasket seat
Technical information
- center electrode: copper core with nickel tip
- hex size: 13/16” / approx. 21 mm
- thread reach: 0.75” / approx. 19.5 mm
- gap: 0.050” / 1.3 mm
- resistance: approx. 4000 Ω
- tip configuration: mid projection
- sales unit: 1 piece
