NGK BR6FS Standard Spark Plug 10-Pack — 14mm Thread, 11.6mm Reach, 0.8mm Gap

NGK BR6FS (4323) is a pack of ten reliable standard nickel spark plugs engineered for consistent ignition, extended service life, and broad compatibility with many small engines and vehicles.

These NGK BR6FS spark plugs come as a 10-pack and provide the familiar durability and dependable performance expected from a factory replacement part. With a 14mm thread, tapered seat, 11.6mm reach and a 0.031" (0.8mm) gap, they are designed for routine tune-ups and maintenance where original-equipment specifications call for a standard nickel electrode plug. The built-in 5 KΩ resistor reduces radio-frequency interference while a solid terminal and ISO overall height make installation straightforward with common tools.

Which engine setups accept NGK BR6FS plugs?

These plugs suit engines that require a 14mm, 1.25mm pitch threaded plug with a tapered seat and 11.6mm reach. They match many aftermarket cross-references and older OEM applications that specify a BR6FS or equivalent type.

• Thread size: 14mm, thread pitch: 1.25mm.
• Reach: 11.6mm (.460"), tapered seat design for proper sealing.
• Compatible with listed Autolite, Bosch, and Champion cross-references.
• Ideal for vehicles and small engines using a standard nickel electrode plug.

How do these plugs affect ignition performance and longevity?

As a standard nickel plug, the BR6FS delivers steady spark energy and proven wear characteristics. It’s not a high-performance or iridium unit, but it balances cost and reliable service life for routine maintenance schedules.

• Nickel center electrode for dependable conductivity and wear resistance.
• 0.8mm (.031") factory gap for consistent spark timing out of the box.
• 5 KΩ resistor reduces electrical interference with radios and sensors.
• Non-projected electrode and standard size simplify replacement intervals.

What installation details should I know before fitting them?

Installing NGK BR6FS plugs is straightforward when you confirm reach, seat type, and gap match the engine’s specifications. Use the proper 5/8" (16mm) socket and torque to the manufacturer’s recommended value to avoid damage or poor sealing.

• Hex size: 5/8" (16mm) — use the correct spark plug socket.
• Terminal: solid top for conventional boots and connectors.
• Overall height: ISO — fits standard ignition lead arrangements.
• Check and set gap if necessary before installation; torque per service manual.

Are these an OEM equivalent and what cross-references exist?

NGK BR6FS is a genuine NGK replacement part that cross-references many common plug numbers from other manufacturers, making it an easy swap-in for comparable engines that used those original parts.

• Cross-references include several Autolite, Bosch, and Champion part numbers.
• Marketed as a standard replacement rather than an upgraded iridium or platinum option.
• Sold in a 10-pack for multi-cylinder engines or multiple service intervals.

Who is this for: The NGK BR6FS (4323) 10-pack is aimed at mechanics, DIY enthusiasts, fleet owners, and hobbyists who need a cost-effective, OEM-grade standard spark plug for routine maintenance. It’s suited to older cars, motorcycles, lawn and garden equipment, or any compatible engine that specifies a 14mm tapered-seat nickel plug with an 11.6mm reach and 0.8mm gap.