Carbon Steel Double End Studs DIN 939
Product Overview
Double End Studs, conforming to DIN 939, are precision-engineered fasteners featuring threads on both ends and an unthreaded shank in the center. They are commonly used in mechanical assemblies requiring precise alignment and robust holding strength. These studs serve as an essential intermediate connector between two parts, with one threaded end that is typically screwed into a tapped hole, leaving the other end exposed to attach another component with a nut.
Manufactured from high-quality carbon steel, these studs offer excellent load-carrying capacity, enhanced tensile strength, and are suitable for a wide range of industrial environments. At Flybear Fastener, we deliver precision-fabricated Double End Studs that meet strict dimensional and quality standards to ensure reliability and performance in critical applications.
Product Specifications Table
| Parameter | Specification |
|---|---|
| Product Name | Double End Studs |
| Standard | DIN 939 |
| Material | Carbon Steel |
| Thread Type | Metric Thread |
| Sizes Available | M4 to M48 (customizable on request) |
| Thread Length | Customizable (Based on DIN 939 layout) |
| Finish | Black Oxide, Zinc-plated, Plain,HDG |
| Grade | 8.8, 10.9 (Depending on requirement) |
Technical Parameters Table
| Mechanical Property | Grade 8.8 | Grade 10.9 |
|---|---|---|
| Tensile Strength (MPa) | 800 | 1040 |
| Yield Strength (MPa) | 640 | 940 |
| Elongation (%) | 12 | 9 |
| Hardness (HB) | ≤ 248 | ≤ 341 |
Material & Manufacturing Process
Carbon steel is the base material for these DIN 939-compliant Double End Studs. It provides an optimal balance between strength, machinability, and cost. The typical manufacturing workflow at Flybear Fastener includes:
- Raw material inspection (carbon content analysis, hardness test)
- Cutting and shaping (cold drawing or forging)
- Machining (CNC turning for thread accuracy)
- Heat treatment (for strength enhancement)
- Surface treatment (rust prevention and corrosion resistance)
- Final inspection & packaging
Surface finishes like Zinc plating and Black Oxide provide added protection against environmental corrosion, extending the service life of the product.
Typical Applications in Industries and Environments
Double End Studs are widely used in various industrial sectors including:
- Automotive Assembly (engine blocks, exhaust manifolds)
- Power Generation (turbine components)
- Pump and Valve Manufacturing
- Construction Machinery
- Marine Engineering
- Aerospace Ground Equipment
They are ideal for environments where high tensile or shear strength and corrosion resistance are critical. Additionally, their structural design allows for easy disassembly and re-assembly, making them highly favored in maintenance-oriented applications.
Product Strength & Competitive Advantages
Superior Materials:
We utilize high-grade carbon steel to ensure mechanical strength, reliability, and longevity even under heavy loads or stress conditions.
Precision Engineering:
Our Double End Studs comply with tight dimensional tolerances. The threading is precisely cut to provide seamless integration with corresponding nuts and tapped holes.
Advanced Surface Finishing:
We employ various anti-corrosion finishes such as Zinc plating and Black Oxide, significantly improving service life, especially in outdoor or humid conditions.
Customized Solutions:
Whether you need non-standard thread lengths or unique finishes, Flybear Fastener offers tailor-made solutions backed by our engineering team and advanced production capabilities.
On-Time Delivery & Stock Readiness:
With extensive warehouses and advanced logistics, our lead times are minimal, and we maintain a ready stock of standard-size studs to meet urgent needs.
Outstanding Support Services:
Technical consultation, CAD support, and reliable after-sales follow-up ensure that our clients get long-term value.
Quality Control Processes
We employ a multi-stage quality inspection approach that includes:
- Dimensional verification using digital calipers and thread gauges
- Mechanical strength testing
- Salt spray testing for surface coatings
- 100% visual and random sampling inspections
These processes ensure that each stud shipped from Flybear Fastener meets international quality standards.
Selection and Purchasing Guidelines
When selecting your Double End Studs, you should consider:
- Application Requirements: Check tension, load conditions, installation depth
- Material Specifications: Choose the suitable grade (8.8 or 10.9) based on mechanical demands
- Surface Finish: Environment exposure determines whether black oxide or zinc plating is preferred
- Customization Needs: Special dimensions, threads or coating can be requested
For bulk purchases or tailored designs, our team at Flybear Fastener is ready to offer technical consulting and rapid prototyping to accelerate your production schedules.
Additional Information
Double End Studs are often paired with hex nuts and washers in assemblies that require machine serviceability. They are crucial for high-vibration environments due to their ability to maintain structural stability over time. Engine mounts, pressure vessels, and heavy-duty mechanical installations benefit from the dependable nature of these fasteners.
Conclusion & Company Promotion
At Flybear Fastener, we are committed to manufacturing top-tier fastener products that meet both standard and custom application requirements. We pride ourselves on delivering not just components, but complete engineering solutions to help your business grow. We welcome customers from every industry to contact us for a complete catalog or to discuss your specific needs.
We always adhere to the principle of “Quality First, Customer Foremost,” striving to provide high-quality fastener products and one-stop fastening solutions.
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