M4 Allen Countersunk Socket Screws
M4 countersunk socket screws per DIN 7991 / ISO 10642 with 90° conical head and internal hex drive in alloy steel property class 12.9. Flush-mounting for smooth, protrusion-free surfaces at 4mm diameter.
Specification
#
Standard
DIN 7991 / ISO 10642 (EN ISO 10642)
Material
Alloy Steel
Thread
Coarse (standard)
Grade
12.9
Coating
Black oxide
Head Type
Countersunk (flat head) with hexagon socket, 90° included angle
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
#
Countersunk socket screws at 4mm solve the problem of fastener head protrusion on functional surfaces. The 90° conical head seats fully within a prepared countersink, creating a continuous flat surface that eliminates drag and interference with mating parts. In machine tool construction at this diameter, flush mounting prevents workpiece interference on sliding surfaces. The hex socket drive allows single-side installation in confined assemblies. Property class 12.9 provides high tensile strength for dynamically loaded joints, though designers must account for the reduced loadability inherent to countersunk head geometry.
Common Applications
#
Common applications for M4 countersunk socket screws include:
- Precision fixture and jig plates
- Small mechanism mounting surfaces
- Electronic enclosure flush panels
- Optical equipment base plates
- Instrument mounting surfaces
Read Me
| Standard | DIN 7991 / ISO 10642 (EN ISO 10642) |
| Material | Alloy Steel |
| Thread | Coarse (standard) |
| Grade | 12.9 |
| Coating | Black oxide |
| Head Type | Countersunk (flat head) with hexagon socket, 90° included angle |
| 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 |
