Basic Product Information
- Product Name: DIN 912 Hexagon Socket Head Cap Screw / Cup Head Screw
- Standard: DIN 912 (equivalent to ISO 4762 / GB/T 70.1)
- Strength Grade: Grade 8.8 (High Strength),Tensile Strength ≥ 800 MPa, Yield Strength ≥ 640 MPa
- Material: Medium-carbon steel (quenched and tempered)
- Surface Treatment: Electrogalvanized (Blue-white zinc / Color zinc / Black zinc)
- Thread Type: Metric coarse thread M series
- Supply Form: Full-thread / Partial-thread
Product Features
- High-strength structural fasteners for superior load-bearing capacity: Grade 8.8, quenched and tempered, offers significantly higher strength than Grade 4.8. Ideal for applications involving vibration, heavy loads, and high stress, ensuring safer and more reliable connections.
- Zinc-plated for rust prevention and broader environmental applicability: The zinc coating effectively enhances corrosion and rust resistance, making these fasteners suitable for humid, general outdoor, and industrial environments, thereby extending their service life.
- DIN Standard Precision, Strong Interchangeability: Manufactured strictly in accordance with the DIN 912 standard, with uniform head dimensions, internal hexagon dimensions, and thread precision. Universally compatible worldwide, suitable for assembly in various equipment.
- Hex socket design for efficient installation: The cylindrical head with a hex socket structure ensures stable torque transmission and prevents slippage, making it ideal for tight spaces and concealed installations.
- Complete range of specifications available for bulk supply: A full range of standard sizes from M3 to M24, with lengths from 6 mm to 150 mm, is available for both stock and custom production.
Applications
- Machine tools and automated machinery assembly
- Fixing of molds, jigs, and tooling
- Fastening of automotive parts and construction machinery
- Connecting steel structures, frames, and brackets
- Industrial fastening applications requiring both high strength and corrosion resistance
Standard Size Chart
Key Dimensions
|
Thread Specifications |
Pitch P |
Head Diameter dk (max) |
Head Height k (max) |
Hexagon Socket Diagonal s |
Hexagon Socket Depth t (min) |
|
M3 |
0.5 |
5.5 |
3.0 |
2.5 |
1.6 |
|
M4 |
0.7 |
7.0 |
4.0 |
3.0 |
2.0 |
|
M5 |
0.8 |
8.5 |
5.0 |
4.0 |
2.5 |
|
M6 |
1.0 |
10.0 |
6.0 |
5.0 |
3.0 |
|
M8 |
1.25 |
13.0 |
8.0 |
6.0 |
4.0 |
|
M10 |
1.5 |
16.0 |
10.0 |
8.0 |
5.0 |
|
M12 |
1.75 |
18.0 |
12.0 |
10.0 |
6.0 |
|
M14 |
2.0 |
21.0 |
14.0 |
12.0 |
7.0 |
|
M16 |
2.0 |
24.0 |
16.0 |
14.0 |
8.0 |
|
M20 |
2.5 |
30.0 |
20.0 |
17.0 |
10.0 |
|
M24 |
3.0 |
36.0 |
24.0 |
19.0 |
12.0 |
Standard Length Series (mm)
6, 8, 10, 12, 16, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 80, 90, 100, 110, 120, 130, 140, 150
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