Hexagon Socket Button Head Screws

ISO 7380

Low-Profile Internal Hex Screws for Compact & Aesthetic Assemblies

Manufacturer & Exporter: Super Industries India

1. Overview of ISO 7380

ISO 7380 defines hexagon socket button head screws; a fastener designed for applications where:

• Head height must be minimal
• A smooth, rounded appearance is required
• Internal hex drive is preferred over external drives

Button head screws are widely used in modern machinery, electronics housings, automotive interiors, and visible assemblies.

2. Key Design Characteristics

• Low-profile domed head
• Internal hexagon drive
• Larger bearing surface than countersunk screws
• Reduced risk of surface damage

ISO 7380 screws provide a balance between strength, compactness, and aesthetics.

3. Why Engineers Choose ISO 7380

Compared to socket head cap screws (ISO 4762), ISO 7380 offers:

• Lower head height
• Better appearance in exposed assemblies
• Safer edges (no sharp corners)
• Adequate strength for medium-load applications

4. Dimensional Range

Typical standardized sizes:

• Thread sizes: M3 to M16 (larger sizes on request)
• Lengths: 6 mm to 100 mm
• Metric coarse threads as per ISO 965

Head diameter and height are tightly controlled to ensure flush appearance.

5. ISO 7380-1 vs ISO 7380-2

Variant	Feature
ISO 7380-1	Standard button head
ISO 7380-2	Button head with collar (flange)

Flanged versions distribute load and eliminate the need for washers.

6. Thread & Tolerance System

• Metric ISO thread profile
• Standard tolerance class: 6g
• High concentricity between head and shank

This ensures smooth tightening and proper load distribution.

7. Strength Grades Available

ISO 7380 screws are commonly produced in:

Property Class	Typical Use
8.8	General engineering
10.9	Automotive & machinery
A2-70	Stainless steel
A4-80	Corrosion-resistant environments

Super Industries India supplies 10.9 grade button head screws for export markets.

8. Materials Offered

• Carbon steel
• Alloy steel
• Stainless steel (AISI 304 / 316)
• Special alloys on request

Material selection depends on load, corrosion exposure, and temperature.

9. Heat Treatment Process

For alloy steel grades:

• Quench & temper treatment
• Controlled hardness testing
• Consistent mechanical properties across batches

10. Surface Finish Options

• Black oxide
• Zinc plated (white / yellow)
• Phosphate coated
• Stainless natural finish
• Custom coatings for export compliance

11. Torque Characteristics

Internal hex drive allows:

• Higher torque than Phillips or slotted screws
• Reduced cam-out
• Better tightening control in confined spaces

12. Washer & Seating Behavior

ISO 7380 screws:

• Often used without washers
• Flanged version (ISO 7380-2) replaces washer
• Suitable for aluminum and softer materials

13. Engineering Applications

• Automotive interiors & trim
• Machine guards
• Control panels
• Electronics enclosures
• Furniture & architectural hardware

14. Advantages in Visible Assemblies

✔ Smooth rounded head
✔ No sharp edges
✔ Professional finish
✔ Compact installation

This makes ISO 7380 ideal where appearance matters.

15. Comparison with Similar Standards

Standard	Difference
ISO 4762	Taller cylindrical head
ISO 7991	Countersunk head
DIN 7380	Legacy equivalent
ISO 7380	Global ISO replacement

16. Installation Guidelines

• Use correct Allen key size
• Avoid over-tightening
• Ensure clean mating surface
• Use thread locker for vibration environments

17. Failure Modes to Avoid

❌ Using ISO 7380 for very high tensile loads
❌ Incorrect tool size causing socket damage
❌ Mixing grades in assemblies

18. Export Supply by Super Industries India

We provide:

• Bulk & palletized export packing
• Grade-wise labeling
• OEM customization
• International compliance documentation

19. Custom Manufacturing Capabilities

• Special head dimensions
• Non-standard lengths
• Special coatings
• Branding for OEM buyers

20. Conclusion

ISO 7380 button head screws are the preferred solution for compact, aesthetic, and medium-load assemblies where internal hex drive and smooth appearance are required.

Super Industries India manufactures ISO 7380 fasteners to meet international quality and export expectations.