Description
Overview
ISO 7380 defines a hexagon socket button head screw with a low rounded head. The button head provides a neat appearance and a broad bearing surface, while the internal hex drive allows installation where external spanner clearance is not available.
This selected size is specified with diameter M6, length 25 mm, thread M6, pitch 1 mm.
Sold in multiples of '50 pieces. 1 Box = '50 pieces.
Material, Grade & Strength
A4 stainless steel, commonly associated with 316 stainless, is selected for improved corrosion resistance in coastal, chemical and harsh outdoor environments.
Finish & Corrosion Protection
Corrosion resistance is provided by the stainless material itself rather than a plated coating.
Typical Uses
ISO 7380 button head screws are used on visible assemblies, equipment covers, guards, frames, furniture, panels and light machinery where a low-profile rounded head is preferred.
Technical Tips
- Use the correct hex key or socket bit to avoid rounding the drive.
- Button heads are lower than socket cap screws, so check suitability for high-load joints.
- Use washers where surface protection or load spreading is needed.
- Select stainless or coated finishes for exposed environments.
Frequently Asked Questions
When should a button head be used? Use it where appearance, low profile and internal hex drive access are more important than the higher head strength of a socket cap screw.
Dimensions – ISO 7380 M6 x 25
| Standard | ISO 7380 |
|---|---|
| Product | Hexagon socket button head screw |
| Thread | M6 x 1 |
| Length (l) | 25 mm |
| Head diameter (dk) | 10.5 mm |
| Head height (k) | 3.3 mm |
| Hex key (s) | 4 mm |
| Weight (calculated) | 5.83 kg per 1 000 pieces |
Material, Grade & Strength
| Material | Stainless steel A4 (316) |
|---|---|
| Steel grade | AISI 316 (1.4401) |
| Composition | C max 0.07%, Cr 16.5-18.5%, Ni 10.0-13.0%, Mo 2.0-2.5% |
| Property class | A4-70 (ISO 3506) unless marked -80 |
| Tensile strength Rm (min) | 700 MPa (class 70), 800 MPa (class 80) |
| Yield Rp0.2 (min) | 450 MPa (class 70), 600 MPa (class 80) |
| Typical use | marine, coastal, chlorides, chemical plant |
Finish & Corrosion Protection
Plain / self colour: No applied coating. Stainless, brass and nylon parts are supplied plain; plain steel parts need oil, paint or protected environments.
ISO 7380 data sheet – all sizes
| Size | Thread | Head diameter (dk) | Head height (k) | Hex key (s) |
|---|---|---|---|---|
| M3 | M3 x 0.5 | 5.7 mm | 1.65 mm | 2 mm |
| M4 | M4 x 0.7 | 7.6 mm | 2.2 mm | 2.5 mm |
| M5 | M5 x 0.8 | 9.5 mm | 2.75 mm | 3 mm |
| M6 | M6 x 1 | 10.5 mm | 3.3 mm | 4 mm |
| M8 | M8 x 1.25 | 14 mm | 4.4 mm | 5 mm |
| M10 | M10 x 1.5 | 17.5 mm | 5.5 mm | 6 mm |
| M12 | M12 x 1.75 | 21 mm | 6.6 mm | 8 mm |
| M16 | M16 x 2 | 28 mm | 8.8 mm | 10 mm |
Nominal dimensions per ISO 7380. Weights are calculated from nominal dimensions and are a guide only (±10%). Values for fit and strength should be confirmed against the standard for critical applications.
Specifications
| Measurement Type | Metric |
|---|---|
| Thread Size | M6 |
| Thread Pitch | 1 mm |
| Thread Style | Fully Thread |
| Drive Size | 4 mm |
| Drive Type | Socket |
| Head Style | Button |
| Diameter | M6 |
| Length | 25 mm |
| Material | Stainless Steel |
| Finish | Stainless steel |
| Grade | Grade (A4) |
| Standards Met | ISO 7380 |
| Package Quantity | 50 |
| Package Type | Box |