rom the World Leader in Spark Plugs - Standard Construction that is specified by Many O.E.M. Manufacturers.
5574 NGK BPM8Y Solid V-Groove Spark Plug (Echo 15901019830)

Plug Specifications
Thread Size: 14mm
Hex Size: 3/4" (19mm)
Reach: 9.5mm (3/8")
Seat Type: Gasket
Gap: .028" (0.7mm)
Heat Range: 8
Terminal Type: Solid
Resistor: No
Overall Height: JIS
Thread Pitch: 1.25mm
Center Electrode
Type: V-Cut
Material: Nickel
Size: 2.5mm
Projection: Projected
Ground Electrode
Type: Standard
Material: Nickel

The "Solid" option for NGK BPM8Y stock number 2057 - Typically used where high vibration resistance is desired (Removable tip plugs can work loose
and end up needing to be replaced as threads shear away)

May also cross reference to these plugs:

Autolite 2976
Autolite XST2976
Champion CJ6Y
NGK stk 2057



- The #1 Spark plug for Performance. Standard Features for most all NGK Plugs include:

Corrugated Ribs help prevent "Flashover" of spark which can lead to harmful misfires and rob you of performance.
Highly pure Alumina Silicate insulator ensures dielectric strength and incredible physical strength. Sophiscated ceramic properties ensure correct heat transfer for reduced fouling and accurate engine operating temperatures.
Triple Gasket sealing process virually eliminated the possibhility of combustion gas leakage back through the shell. (You've probably seen other spark plugs that are black and sooty where the ceramic meets the metal shell, right?) - Some manufacturers use only one or two seals.
Solid Copper Core - Other manufacturers claim to use a solid copper core, but NGK uses a large amount of copper to ensure greater spark and heat transfer.
Longer insulator nose - This superior design, sometimes called a "Power Tip" helps prevent loading up or fouling, even after prolonged periods of idling, or at slow speeds.
Double Dipped Zinc Chromate shell - NGK double dips all of their shells in a tough, corrosion resistant zinc chromate coating, ensuring maximum rust resistance. (Note: Anti-Sieze should NOT be used on NGK Spark plugs in outdoor power equipment applications.)