M3 Allen Countersunk Socket Screws
M3 flat-head socket screws to ISO 10642 in property class 12.9 alloy steel. 90° conical bearing surface with hex socket drive for flush installation at 3mm 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
#
At 3mm, countersunk socket screws enable flush-mounted joints in assemblies where protruding heads create functional or safety issues. The 90° head angle matches standard countersink tooling, simplifying hole preparation. Hex socket drive allows high-torque installation from one side, essential for blind-hole applications. The full shank tensile strength of property class 12.9 is available for load calculations, though head loadability is reduced by the conical geometry. Black oxide finish provides minimal corrosion protection suitable for indoor and lubricated assemblies.
Common Applications
#
Typical applications for 3mm countersunk socket screws:
- Aerospace skin panels and aerodynamic surfaces
- Architectural metalwork and facade panels
- Heavy machinery cover plates
- Structural steel flush connections
- Automotive chassis and frame components
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 |
