Genuine NGK 7421 BMR6A Spark Plugs
Item Specifics
NGK OEM Spark Plug
Part Number: 7421 BMR6A
Replaces: NGK 5921 BM6A
The NGK 7421 BMR6A is a premium standard spark plug engineered for reliable ignition, long service life, and consistent performance in small engines. Featuring a copper core and trivalent metal plating for corrosion resistance.
Technical Specifications
| Specification | Value |
|---|---|
| Thread Diameter | 14 mm |
| Thread Pitch | 1.25 mm |
| Reach | 9.5 mm (3/8″) |
| Hex Size | 3/4″ (19 mm) |
| Gap | 0.028″ |
| Electrode Material | Nickel |
| Core Material | Copper |
| Plating | Trivalent Metal (Anti-corrosion) |
Compatible Engine & Equipment
| Component | Model / Type |
|---|---|
| Spark Plug Type | Standard Resistor Spark Plug |
| Primary Application | Small Engines (Lawn & Garden, Power Equipment) |
Key Details
- Direct Replacement: Cross-references to and replaces NGK part number 5921 BM6A.
- Premium Construction: Copper core design for efficient heat removal and consistent spark performance.
- Corrosion Resistant: Trivalent metal plating provides superior anti-seizing and anti-corrosion protection.
- Wide Compatibility: Standard 14mm thread with 9.5mm reach fits many small engine applications.
We at Red Rock Turf are a stocking distributor for Briggs and Stratton, Kohler, Toro dealer. We not only sell their OEM parts but we also use them on our equipment repairs and rebuilds. If there is something you need and don’t see it on one of our auctions, please email me through [email protected] and I can get it in and create an auction for that item.
We also ship internationally!
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