Cummins Hex Flange Head Cap Screw 3900633 – Reliable Fastening for Demanding Diesel Engines
The Cummins Hex Flange Head Cap Screw 3900633 is a heavy-duty fastener designed for strength, stability, and long-term reliability. Its built-in flange distributes load evenly across connected surfaces, helping reduce stress and preventing part damage. As part of trusted DCEC parts, this screw offers a secure and lasting solution in both engine assembly and repair settings.
Built to exact Cummins genuine parts standards, it delivers the performance you need in harsh, high-vibration environments. Whether you’re working on a new engine or replacing hardware during maintenance, this cap screw fits with precision and holds firm.
📦 Specifications
- Part Number: 3900633
- Part Name: Hex Flange Head Cap Screw
- Material: Heat-treated steel alloy
- Finish: Corrosion-resistant coating
- Condition: 100% Brand New
- Category: Engine Fasteners
- Origin: Manufactured to meet Cummins OEM quality
- Compatibility: Works with various Cummins parts and DCEC parts (confirm with Engine Serial Number)
✅ Key Features
- Distributes clamping force efficiently through a flanged head design
- High-strength material resists both tension and shear
- Rust-resistant finish enhances durability over time
- Tight thread tolerance ensures secure and easy installation
- Fully compatible with Cummins genuine parts and DCEC parts assemblies
🔧 Technical Insights
To begin with, the flange-style head increases surface contact, which allows better torque transfer and reduces the risk of loosening. Furthermore, the threads are cut with precision to guarantee a tight and uniform fit, even under repeated thermal expansion. Unlike standard bolts, this cap screw offers better alignment and resistance to shifting, which is essential in high-load diesel engine environments.
Because it’s built to OEM specs, it integrates smoothly with other Cummins parts and maintains structural integrity across the entire engine.
💡 Application Scenarios
The 3900633 Hex Flange Head Cap Screw is ideal for:
- 🔹 Mounting brackets and support frames in DCEC parts engine assemblies
- 🔹 High-vibration components in Cummins genuine parts systems
- 🔹 Diesel trucks, buses, and generators requiring stable, long-term fasteners
- 🔹 Cylinder head or accessory mounting during engine rebuilds
- 🔹 OEM and aftermarket engine services involving Cummins parts
🚚 Availability
The Cummins 3900633 Cap Screw is in stock and available for fast global shipping.
For accurate fitment, please provide your Engine Serial Number (ESN). Our team is ready to help confirm compatibility with your DCEC parts configuration.
