4 Genuine NGK 7421 BMR6A Spark Plugs
Item Specifics
NGK OEM Spark Plug Kit
Part Number: 7421 BMR6A
Quantity: 4 Plugs
Replaces: NGK 5921 BM6A
This 4-pack of genuine NGK 7421 BMR6A spark plugs is designed for small engines, offering longer life and optimum performance. Features include trivalent metal plating for corrosion resistance, copper core for heat removal, and triple sealing to prevent leakage.
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/Anti-seizing) |
| Sealing | Triple-Sealed |
| Insulator | Pure Alumina Silicate Ceramic |
Compatible Engine & Equipment
| Component | Model / Type |
|---|---|
| Spark Plug Type | Standard Resistor Spark Plug |
| Primary Application | Small Engines (Lawn & Garden Equipment) |
Key Details
- Direct Cross-Reference: Replaces NGK part number 5921 BM6A for small engine applications.
- Premium Features: Copper core, triple sealing, and corrugated ribs prevent flashover and leakage.
- Corrosion Protection: Trivalent metal plating ensures easy removal and long-term durability.
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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