Product introduction
As a Cummins ReCon certified product, the Cummins 3818121X flange bolts share the same technical standards as K19, K38, and K50 Cummins Flange bolts. They integrate a hexagonal flange head with a toothed anti-loosening structure, automatically locking the flange face under continuous 800°C exhaust temperatures and high-frequency vibration, significantly reducing the risk of leakage due to bolt loosening. This enables cross-platform maintenance and interchangeability, ensuring sealing performance and structural reliability.
Product Images
Product Parameters
| Parameter category | Detailed Description |
| Part number | 3818121X |
| Thread specification | M14×1.5 |
| Bolt length | 45 mm |
| Head type | Hexagonal flange head |
| Material | Alloy steel (SAE 4140) |
| Strength grade | Level 10.9 |
| Surface treatment | Zinc-nickel alloy coating |
| Anti-loosening design | The bottom of the flange head integrates an elastic toothed structure that meshes with the flange surface, effectively suppressing bolt loosening caused by thermal cycling and vibration. |
| Compatible model | For K19, K38, K50 series diesel engines |
Product Advantages
The 3818121X flange bolt, as an original equipment manufacturer (OEM) standard part, is seamlessly compatible with the entire K19, K38, and K50 engine series, enabling cross-platform maintenance and interchangeability, reducing spare parts inventory complexity, and improving maintenance efficiency. Manufactured from SAE 4140 alloy steel, with a high-strength design of grade 10.9 and a tensile strength exceeding 1040 MPa, it effectively resists vibration and thermal cycling stress under high-load conditions, eliminating the risk of breakage. The surface is treated with a zinc-nickel alloy plating, passing a ≥480-hour neutral salt spray test, far exceeding ordinary galvanized parts, maintaining stable performance in humid and high-salt environments over a long period.
FAQ
Q: 1. Which engine models are compatible with the Cummins 3818121X flange bolts?
A：The 3818121X flange bolts are Cummins original equipment manufacturer (OEM) standard parts, specifically designed for flange connections in K19, K38, and K50 series engines, such as cylinder heads, turbochargers, and exhaust manifolds. They are cross-series compatible and can directly replace worn OEM parts.
Q: 2. What are the material and torque standards for this bolt?
A: Made of high-strength alloy steel, resistant to high temperature and pressure. The standard installation torque is 80–100 N·m. A torque wrench must be used to tighten according to specifications to avoid overtightening, which could damage the threads or deform the flange.
Q: 3. Can the flange bolts for K19, K38, and K50 engines be used interchangeably?
A:Yes. Cummins uses a standardized connection design in the K19, K38, and K50 series. The 3818121X flange bolts are universal parts, sharing specifications with other components in the same series (such as T-clamps and oil seals), without needing to distinguish between engine models.
Q: 4. Are anti-loosening gaskets or sealant required during installation?
A:The manufacturer recommends using the matching metal flat gasket; sealant is not required. If the flange surface has minor damage, a high-temperature anaerobic sealant can be used, but excessive use is strictly prohibited to avoid contaminating the oil lines or cooling system.
Q: 5.Is this product a dangerous good?
A:Is a special transport permit required? It is not a dangerous good and does not require UN certification or a dangerous goods transport permit. It can be exported as ordinary mechanical parts by sea or air, but the packaging must be free of oil residue to prevent it from being mistakenly identified as contaminated goods.
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