ISO 7380-1
Hexagon Socket Button Head Screws
Low-Profile, High-Strength Fasteners for Compact Assemblies
Manufacturer & Exporter: Super Industries India
1. Introduction to ISO 7380-1
ISO 7380-1 specifies hexagon socket button head screws with a rounded, low-profile head and internal hex drive. These screws are engineered for applications where:
- Space is limited
- A smooth, aesthetic finish is required
- Moderate to high clamping force is needed
ISO 7380-1 screws are widely used in modern machinery, automation systems, and architectural assemblies.
Super Industries
Global Manufacturer of Heavy & Custom Engineered Fasteners & Flanges
2. Why ISO 7380 is Important in Engineering Design
Button head screws offer a balance between:
- Strength
- Compact head height
- Visual appearance
Engineers prefer ISO 7380-1 when socket head cap screws (ISO 4762) are too tall and countersunk screws (ISO 7991) are unnecessary.
3. Head Design & Geometry
- Head type: Button (domed) head
- Drive type: Hexagon socket
- Larger bearing surface than countersunk screws
- Lower profile than cylindrical socket head screws
This geometry distributes load efficiently while maintaining a smooth surface.
4. Dimensional Range
Typical ISO 7380-1 sizes:
- Thread sizes: M3 to M16
- Lengths: 6 mm to 100 mm
- Metric coarse thread as standard
Custom lengths are available from Super Industries India for OEM and export projects.
5. Thread & Tolerance System
- ISO metric threads
- External thread tolerance: 6g
- Compatible with ISO 965 internal threads
Precision threading ensures consistent torque and preload values.
6. Mechanical Property Classes
ISO 7380-1 screws are commonly manufactured in:
| Property Class | Tensile Strength |
|---|---|
| 8.8 | 800 MPa |
| 10.9 | 1000 MPa |
| 12.9 | 1200 MPa |
10.9 and 12.9 grades are preferred for industrial and export-grade applications.
Super Industries
Global Manufacturer of Heavy & Custom Engineered Fasteners & Flanges
7. Material Options
- Carbon steel
- Alloy steel
- Stainless steel (A2-70, A4-80)
- Special alloys on request
Material selection depends on load, environment, and corrosion exposure.
8. Heat Treatment Process
High-strength ISO 7380-1 screws undergo:
- Controlled quenching & tempering
- Hardness verification
- Microstructure inspection
Typical hardness:
- Class 12.9: 44–48 HRC
9. Surface Finishes & Coatings
Common finishes include:
- Black oxide
- Zinc plated (clear / yellow)
- Phosphate coated
- Stainless steel natural finish
Custom export coatings available as per buyer specifications.
10. Load & Performance Characteristics
- Strong tensile capacity
- Better load distribution than countersunk screws
- Suitable for moderate shear applications
- Requires washer in softer materials
11. ISO 7380-1 vs ISO 4762 vs ISO 7991
| Feature | ISO 7380-1 | ISO 4762 | ISO 7991 |
|---|---|---|---|
| Head Profile | Rounded, low | Cylindrical | Flush |
| Strength | Medium-High | Highest | Medium |
| Appearance | Smooth & aesthetic | Industrial | Flush |
| Machining | No countersink | None | Countersink required |
12. Installation Best Practices
✔ Use correct hex key
✔ Apply controlled torque
✔ Use washers if needed
✔ Avoid overtightening
Button head screws allow easier alignment during assembly.
13. Washer & Seating Considerations
- Flat washers recommended for soft materials
- Prevent surface marking
- Improve load distribution
14. Typical Applications
- Automation equipment
- Electronic enclosures
- Automotive interiors
- Sheet metal assemblies
- Furniture & architectural fittings
- Robotics & light machinery
15. Advantages of ISO 7380-1
✔ Compact head height
✔ Clean visual finish
✔ Internal drive for controlled torque
✔ Easier handling during assembly
16. Limitations
Lo1wer tensile capacity than socket head cap screws
Not suitable for extremely high-load joints
17. Manufacturing by Super Industries India
We supply ISO 7380-1 screws with:
- Export-grade quality control
- Batch traceability
- Custom packaging
- OEM & project-based supply
18. Customization Capabilities
- Special thread lengths
- Stainless & alloy grades
- Custom coatings
- Branding & private labeling
19. Industries We Serve
- Automotive & EV
- Industrial automation
- Electrical & electronics
- Construction hardware
- Export trading companies
20. Conclusion
ISO 7380-1 button head screws are the ideal fastening solution where compact design, aesthetics, and reliable strength are required.
Super Industries India manufactures ISO 7380-1 fasteners in compliance with global ISO standards, delivering customized solutions to buyers worldwide.