Niterra 4323 BR6FS Standard Nickel Spark Plug

The Niterra 4323 BR6FS is a standard nickel spark plug engineered for reliable performance across automotive, marine, powersports, and small engine applications. Formerly manufactured under the NGK brand name, this spark plug delivers proven OE-quality ignition with superior heat dissipation and long service life.

Key Features:

• Solid copper core constructed from 98% pure copper for superior heat dissipation and conductivity
• High-grade alumina silicate ceramic insulator provides exceptional strength and optimal dielectric performance
• Trivalent metal plating delivers superior anti-corrosion and anti-seizing properties for easy installation and removal
• Cold-rolled threads prevent cross-threading and damage to cylinder heads
• Triple gasket sealing process eliminates gas leakage past the shell
• Corrugated ribs on insulator prevent flashover
• Wide heat range resists carbon buildup and pre-ignition

Specifications:

• Thread Size: 14mm
• Thread Pitch: 1.25mm
• Seat Type: Tapered
• Hex Size: 5/8" (16mm)
• Reach: 11.6mm (0.460")
• Gap: 0.031" (0.8mm)
• Resistor Value: 5K Ohm
• Terminal Type: Solid
• Electrode Material: Nickel

This spark plug is commonly used in lawn mowers, chainsaws, trimmers, marine engines, and various powersports equipment. Cross-references include Autolite 136/143/144/145, Bosch HR8AC, and Champion RBL8/RV8C. Torque specifications: 10.8-18 lb-ft for cast iron heads, 7.2-14.5 lb-ft for aluminum heads.