NGK BP5HS Spark Plug – Stock No. 4111
The NGK BP5HS is a standard copper-core spark plug with a projected tip for clean, consistent ignition. It suits many classic engines that use a 14 mm short-reach plug and do not require a resistor type. It helps cold starts, reduces fouling, and maintains stable idle on everyday road use.
- Projected tip for reliable cold starting and smooth idle
- Copper core for better heat transfer and durability
- Short reach for older heads that specify 1/2 inch reach plugs
| Part number | BP5HS |
| NGK stock number | 4111 |
| Part category | 686 – Spark Plug |
| GTIN | 087295141113 |
| Thread diameter | 14 mm |
| Thread pitch | 1.25 |
| Reach (thread length) | 12.7 mm (1/2 inch) |
| Hex size | 20.8 mm (13/16 inch) |
| Seat type | Gasket |
| Construction | Nickel alloy with copper core centre electrode |
| Resistor | No (non-resistor) |
| Heat range | 5 (NGK scale) |
| Tip design | Projected insulator |
| Factory gap | Approx. 0.7 mm (adjust to vehicle spec) |
Fitment guidance
Suitable for many classic cars, bikes, and small marine engines that specify a 14 mm, 1/2 inch reach, non-resistor projected-tip plug (BP5HS). Use the vehicle lookup to confirm, or check the Vehicle Fitment tab for full details.
Important: Always match the exact plug code specified by your engine maker. Set the gap to the vehicle specification and tighten to the correct torque. If your vehicle requires a resistor plug, choose BPR5HS instead.
The price displayed is for a single plug, please add the desired amount to your basket.


