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| Part Number | IFR7F-4D |
| NGK Inventory Number | 5115 |
| Spark Plug Type | Laser Gold-Iridium |
| Center Electrode Material | Iridium |
| Outer Electrode Count | 1 Ground Terminal |
| Thread Size | M14 x 1.25 |
| Thread Length | 19mm (0.749 inches) |
| Wrench Size | 16mm |
| Seal Type | washer seal |
| Resistance Value | 5kΩ |
| Center Electrode Type | Extremely Fine Tip |
| Application Fuel | Natural Gas (CNG/LNG) |
Manufacturer No.
IFR7F-4D5115
OEM Part No.
5115
Engine Part No.
WD615YC6GYC6LTCD 2013
Interchange No.
FR3KII332RC78WYP15RC78WYP15T0627400-85011
Fitment Vehicles
SINOTRUK HowoSINOTRUK SteyrShaanxi Auto DelongDongfeng TianlongYuchai Machinery
Engine System - Industrial Encyclopedia
Professional supply of NGK IFR7F-4D (5115) laser iridium spark plugs, original OE quality. This spark plug features an iridium center electrode, six times harder than platinum, paired with 98% pure copper core and high purity alumina ceramic insulator, ensuring ultra-long service life and stable ignition. Suitable for heavy trucks such as China Heavy Duty Howo, Shaanxi Heavy Duty DeLong, and natural gas (CNG/LNG) engines of Yuchai, Weichai WD615 series, with thread size M14×1.25, wrench size 16mm, with resistor (5kΩ) and sealing washer. Widely used in long-distance coaches, heavy trucks, and construction machinery. In stock supply, supporting bulk purchase.