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| Ground Electrode Quantity | 1 |
| Thread Diameter | 0.551 |
| Part Number | BKR4E |
| Heavy Duty Supplier | Yes |
| Service Number | BKR4E |
| Ground Configuration | J-Gap |
| Washer Included | Yes |
| Center Electrode Core Material | Copper Core |
| Short Style Spark Plug | No |
| Seat Type | Gasket |
| Center Electrode Tip Material | Nickel w/ V-groove |
| Insulator Height | 1.99 |
| Ground Electrode Core Material | Nickel Core |
| Skirt Length | 0.0 |
| Material Grade | Nickel/Copper |
| Resistor Type | Yes |
| Alliance Keywords | spark plug, bougie d'allumage, bougie |
| Manufacturer Heat Range | 4 |
| Reach | 19.0 |
| Ground Electrode Tip Design | Standard |
| Electrical Terminal Type | Non-removable Nut |
| Thread Size | M14 - 1.25 |
| Resistance | 5000.00 |
| Gap Size | 0.9 |
| Insulator Material | Ceramic |
| Stock Number | 4421 |
| Metallurgy | Copper |
| Grade Type | Standard Replacement |
| Hex Size | 5/8" (16mm) |
| Part Terminology | Spark Plug |
