DIN SOCKET HEAD CAP SCREWS
DIN 912 | DIN 7984 | DIN 7991
Manufacturer & Exporter – Super Industries India
1. Introduction to DIN Socket Head Cap Screws
DIN Socket Head Cap Screws are high-strength precision fasteners designed for applications where high clamping force, compact installation, and clean aesthetics are required. These screws are characterized by an internal hexagon (Allen) drive, allowing higher torque transmission compared to slotted or Phillips screws.
At Super Industries India, we manufacture and export a complete range of DIN socket head screws for global OEMs, machinery manufacturers, tool makers, automotive industries, and heavy engineering sectors. Our products comply strictly with DIN, ISO, and ASTM standards, ensuring reliability in critical applications.
Super Industries
Global Manufacturer of Heavy & Custom Engineered Fasteners & Flanges
2. What Makes Socket Head Cap Screws Special?
Socket head screws are preferred over conventional hex bolts when:
- Space is limited
- A flush or compact head is required
- High tensile strength is needed
- Precise torque control is essential
Key Advantages
✔ High strength-to-size ratio
✔ Clean, modern appearance
✔ Better fatigue resistance
✔ Suitable for automation and CNC assemblies
3. DIN 912 – Hexagon Socket Head Cap Screws
Definition
DIN 912 specifies cylindrical head screws with internal hexagon drive, commonly known as Allen bolts.
Key Characteristics
- Cylindrical head with flat top
- Internal hexagon socket
- Full or partial thread
- High tensile strength
Dimensional Range
- Diameter: M3 to M64
- Length: Up to 500 mm (custom lengths available)
ISO & ASTM Equivalents
- ISO 4762
- ASTM A574
Typical Applications
- Machine tools
- Automotive assemblies
- Robotics & automation
- Pumps, valves & compressors
- Aerospace & precision equipment
4. DIN 7984 – Low Head Socket Head Cap Screws
Definition
DIN 7984 covers low-profile socket head screws, used where head height must be minimized.
Key Features
- Reduced head height
- Internal hex drive
- Maintains good tensile strength
- Ideal for tight clearances
Applications
- Electronics housings
- Compact machinery
- Automotive interiors
- Aerospace assemblies
Engineering Advantage
DIN 7984 screws reduce protrusion while maintaining adequate clamping force, making them ideal for design-critical assemblies.
5. DIN 7991 – Countersunk Socket Head Cap Screws
Definition
DIN 7991 specifies countersunk (flat head) socket screws designed to sit flush with the mating surface.
Key Features
- Conical head (90°)
- Flush installation
- Internal hex drive
- High tensile strength
ISO Equivalent
- ISO 10642
Applications
- Tooling fixtures
- Sheet metal assemblies
- Aerospace & marine
- Decorative and safety-critical surfaces
6. Comparison: DIN 912 vs DIN 7984 vs DIN 7991
| Parameter | DIN 912 | DIN 7984 | DIN 7991 |
|---|---|---|---|
| Head Type | Cylindrical | Low Cylindrical | Countersunk |
| Head Height | Standard | Reduced | Flush |
| Space Requirement | Medium | Very Low | Surface flush |
| Torque Capacity | High | Medium | Medium |
| Typical Use | General machinery | Compact designs | Flush surfaces |
7. Materials Offered by Super Industries India
Carbon Steel
- EN 8 / C45
- ASTM A574 (heat treated)
Alloy Steel
- 42CrMo4
- Property Class: 12.9
Stainless Steel
- AISI 304
- AISI 316
- AISI 316L
Special Materials (On Request)
- Duplex Stainless Steel
- Inconel
- Monel
- Titanium
8. Mechanical Property Classes
| Property Class | Tensile Strength (MPa) |
|---|---|
| 8.8 | 800 |
| 10.9 | 1000 |
| 12.9 | 1200 |
Most DIN socket head screws are supplied in Class 12.9 for maximum performance.
9. Manufacturing Process
At Super Industries India, socket screws are produced using advanced manufacturing methods:
1️⃣ Raw material inspection
2️⃣ Precision cold forging
3️⃣ CNC machining of socket
4️⃣ Thread rolling
5️⃣ Heat treatment (quench & temper)
6️⃣ Surface coating
7️⃣ Final inspection
10. Surface Finish Options
- Black Oxide
- Zinc Plated
- Nickel Plated
- Phosphate
- PTFE / Xylan Coating
- Passivation (for SS grades)
11. Quality Control & Testing
✔ Dimensional checks
✔ Torque testing
✔ Hardness testing
✔ Socket depth inspection
✔ Thread gauge verification
✔ Coating thickness testing
All supplies can be accompanied by EN 10204 3.1 certificates.
12. Packaging & Export Readiness
- Box packing with labeling
- Bulk export cartons
- Wooden crates for heavy orders
- Custom packaging as per buyer requirement
Export support includes:
- HS codes
- COO
- Inspection reports
13. Why Buy DIN Socket Head Screws from Super Industries India?
✔ Manufacturer & exporter
✔ DIN / ISO / ASTM compliance
✔ Custom sizes & materials
✔ Competitive pricing
✔ Global logistics support
14. FAQs – DIN Socket Head Screws
Q1: Which DIN socket screw is strongest?
DIN 912 Class 12.9 offers the highest strength.
Q2: Can you supply stainless steel socket screws?
Yes, in AISI 304 & 316.
Q3: Do you manufacture non-standard socket screws?
Yes, based on drawings or samples.
15. Request a Quote
Looking for DIN 912, DIN 7984, or DIN 7991 socket head screws?
📧 sales@superindustriesindia.in