M4 Allen Button Head Socket Screws
M4 button head socket screws per ISO 7380-1 with internal hex drive and reduced-loadability domed head in alloy steel property class 012.9. Low-profile fastening for snag-free surfaces at 4mm diameter.
Specification
#
Standard
ISO 7380-1 (EN ISO 7380-1)
Material
Alloy Steel
Thread
Coarse (standard)
Grade
12.9
Coating
Black oxide
Head Type
Button (domed) with hexagon socket
Drive Type
Hexagon socket (Allen key/hex wrench)
Stock
In stock
Dimension
#
Size (d mm)
Thread Dia (min-max mm)
Pitch
Length (mm)
Thread Length (mm)
M3
2.87-3.00
0.5
6-30
18
M5
4.85-5.00
0.8
8-50
22
M6
5.85-6.00
1.0
10-60
24
M8
7.83-8.00
1.25
12-80
28
M10
9.82-10.00
1.5
16-100
32
- All dimensions in mm, tolerance +/- 0.01 mm. Additional dimensions available on request.
Benefits
#
Button head socket screws at 4mm serve assemblies where head height must be minimised while maintaining hex socket drive capability. The domed profile reduces protrusion above the workpiece, critical in electronic enclosures and instrument panels where vertical clearance is limited. Internal hex socket allows installation in confined spaces where external wrench access is unavailable. Property class 012.9 provides adequate strength for light-duty fastening while the zero-prefixed marking communicates the 80% head load capacity, preventing inadvertent substitution for full-strength fasteners in structural joints. The smooth head surface eliminates catch points on cables, clothing, and moving components.
Common Applications
#
Common applications for M4 button head socket screws include:
- Electronic enclosures and PCB mounting hardware
- Instrument panels and control boxes
- Small mechanism covers and access panels
- Optical equipment and sensor housings
- Prototype and fixture construction
Read Me
| Standard | ISO 7380-1 (EN ISO 7380-1) |
| Material | Alloy Steel |
| Thread | Coarse (standard) |
| Grade | 12.9 |
| Coating | Black oxide |
| Head Type | Button (domed) with hexagon socket |
| Drive Type | Hexagon socket (Allen key/hex wrench) |
| Stock | In stock |
| Size (d mm) | Thread Dia (min-max mm) | Pitch | Length (mm) | Thread Length (mm) |
|---|---|---|---|---|
| M3 | 2.87-3.00 | 0.5 | 6-30 | 18 |
| M5 | 4.85-5.00 | 0.8 | 8-50 | 22 |
| M6 | 5.85-6.00 | 1.0 | 10-60 | 24 |
| M8 | 7.83-8.00 | 1.25 | 12-80 | 28 |
| M10 | 9.82-10.00 | 1.5 | 16-100 | 32 |
