Description
NGK B5ES Spark Plug – Stock No. 6410
The NGK B5ES is a standard nickel-alloy spark plug with a copper core. It delivers reliable ignition, steady idle and clean combustion in many classic and small-capacity engines. It is a non-resistor type, suited to simple ignition systems and older vehicles.
Use it when you want consistent starting, smooth running and long service life without fuss.
- Stable spark for easy starts and smooth idle
- Copper core for better heat transfer and durability
- Standard, non-projected tip to suit many classic applications
- Non-resistor design for maximum spark energy
If your vehicle has sensitive electronics or you use on-board comms/audio, consider a resistor plug (e.g. NGK R types) to reduce radio interference.
Technical specifications
| Part number | NGK B5ES |
| NGK stock number | 6410 |
| GTIN | 087295164105 |
| Category | 686 – Spark Plug |
| Thread diameter | 14.0 mm |
| Thread reach (length) | 19.0 mm |
| Hex size | 20.8 mm (13/16 in) |
| Seat type | Gasket |
| Heat range | 5 (NGK scale) |
| Resistor | No |
| Projection | Non-projected tip |
| Centre electrode | Nickel alloy with copper core |
| Ground electrode | Standard J-type |
| Factory gap | 0.7 mm (adjust as specified by the engine manufacturer) |
| Terminal | Removable SAE nut |
Fitment guidance
This plug fits many classic cars, motorcycles, marine and small engines that use a 14 mm thread, 19 mm reach, gasket-seat plug with a non-projected, non-resistor design. Always confirm fitment with our vehicle lookup or check the Vehicle Fitment tab before ordering.
The price displayed is for a single plug, please add the desired amount to your basket.
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