DIN STUDS & THREADED RODS
DIN 835 | DIN 938 | DIN 939 | DIN 940 | DIN 975 | DIN 976
High-Strength Threaded Fasteners for Critical Assemblies
Manufacturer & Exporter – Super Industries India
1. Introduction to DIN STUDS & THREADED RODS
DIN studs and threaded rods are non-headed fasteners designed to provide high clamping force, uniform load distribution, and easy assembly/disassembly, especially in high-pressure and high-temperature environments.
At Super Industries India, we manufacture DIN-compliant studs and threaded rods for oil & gas, petrochemical, power plants, steel structures, heavy machinery, and flanged connections.
Super Industries
Global Manufacturer of Heavy & Custom Engineered Fasteners & Flanges
2. Types Covered in This Page
| DIN Standard | Description |
|---|---|
| DIN 835 | Double End Studs |
| DIN 938 | Studs – Engagement Length 1×d |
| DIN 939 | Studs – Engagement Length 1.25×d |
| DIN 940 | Studs – Engagement Length 2.5×d |
| DIN 975 | Threaded Rods |
| DIN 976 | Metric Thread Stud Bolts |
3. DIN 835 – Double End Studs
Overview
DIN 835 specifies double-ended studs with different thread lengths on each end, typically used with nuts on both sides.
Features
✔ High clamping strength
✔ Uniform stress distribution
✔ Suitable for permanent joints
Applications
- Flange assemblies
- Heavy machinery housings
- Structural joints
4. DIN 938 – Studs (Engagement Length 1×d)
Overview
DIN 938 studs have short engagement length, ideal where limited material thickness is available.
Key Benefits
- Quick installation
- Compact assemblies
- Reduced material stress
5. DIN 939 – Studs (Engagement Length 1.25×d)
Overview
DIN 939 provides a medium engagement length, offering better load distribution.
Common Uses
- Pump casings
- Valve bodies
- Gearboxes
Super Industries
Global Manufacturer of Heavy & Custom Engineered Fasteners & Flanges
6. DIN 940 – Studs (Engagement Length 2.5×d)
Overview
DIN 940 studs have long engagement, suitable for soft materials like cast iron or aluminum.
Advantages
✔ Higher pull-out resistance
✔ Better load spreading
7. DIN 975 – Threaded Rods
Overview
DIN 975 covers fully threaded rods, widely used in construction and industrial installations.
Key Characteristics
- Continuous thread
- Custom cut lengths
- Easy customization
Typical Applications
- HVAC supports
- Electrical installations
- Anchoring systems
8. DIN 976 – Metric Thread Stud Bolts
Overview
DIN 976 defines fully threaded stud bolts, widely used in pressure vessels and flanged joints.
Subtypes
- DIN 976-1 A (RL type thread end)
- DIN 976-1 B (CH type thread end)
9. Materials Offered
- Carbon Steel (4.6, 5.6, 8.8)
- Alloy Steel (10.9, 12.9)
- Stainless Steel (304, 316, 316L)
- ASTM / EN grades on request
10. Manufacturing Process
1️⃣ Raw material inspection
2️⃣ Thread rolling
3️⃣ Heat treatment
4️⃣ Surface finishing
5️⃣ Quality inspection
11. Surface Finishes
- Black oxide
- Zinc plated
- Hot dip galvanized
- PTFE / Xylan coating
12. Mechanical Properties
| Grade | Tensile Strength |
|---|---|
| 8.8 | 800 MPa |
| 10.9 | 1000 MPa |
| 12.9 | 1200 MPa |
13. Dimensional Range
- Diameter: M6 to M100
- Length: Up to 3000 mm
(Custom lengths available)
14. Quality Control & Testing
✔ Thread gauge inspection
✔ Tensile testing
✔ Dimensional checks
✔ Coating thickness test
15. Export Packaging
- PVC sleeves
- Wooden crates
- Heat-number tagging
16. Studs vs Bolts
| Feature | Studs | Bolts |
|---|---|---|
| Head | No | Yes |
| Load distribution | Excellent | Moderate |
| Reusability | High | Limited |
17. Common Selection Errors
❌ Incorrect engagement length
❌ Wrong material grade
❌ Improper torque application
18. Why Super Industries India?
✔ Precision thread rolling
✔ DIN-compliant production
✔ Custom stud lengths
✔ Global export experience
19. FAQs
Q: Can studs be supplied with nuts?
Yes, we supply complete assemblies.
Q: Do you supply for oil & gas projects?
Yes, project-based supply available.