Product Overview
The DIN 912 High Tensile Allen Bolt is a strength-optimized socket cap screw specifically targeted at high-load industrial and mechanical applications. Unlike general-purpose stainless steel socket screws, this product line focuses on high-tensile carbon and alloy steel grades (8.8 and 12.9), delivering maximum clamping force and shear strength for critical structural and machinery connections.
Differentiated Positioning: High Tensile Grade 8.8 / 12.9
While stainless steel DIN 912 bolts (A2-70) offer corrosion resistance with a tensile strength of 700 N/mm², this high-tensile line provides:
- Grade 8.8: 800 N/mm² tensile strength - 14% stronger than A2-70, with superior yield strength (640 N/mm² vs. 450 N/mm²).
- Grade 12.9: 1200 N/mm² tensile strength - 71% stronger than A2-70, with yield strength of 1080 N/mm², for the most demanding high-stress applications.
- Consistent Clamping Force: The higher yield strength allows greater preload without permanent deformation, resulting in more reliable, vibration-resistant joints.
Mechanical Properties
| Property | Grade 8.8 | Grade 12.9 |
|---|---|---|
| Tensile Strength (min) | 800 N/mm² | 1200 N/mm² |
| Yield Strength (min) | 640 N/mm² | 1080 N/mm² |
| Hardness | HV 220–320 (HRC 22–32) | HV 380–440 (HRC 39–44) |
| Elongation (min) | 12% | 8% |
| Reduction of Area (min) | 52% | 44% |
| Impact Strength (room temp) | ≥ 30 J (ISO V-notch) | ≥ 25 J (ISO V-notch) |
| Recommended Preload | 70% of yield | 75% of yield |
Product Schema
Structured data markup includes: materialGrade (8.8/12.9), tensileStrength (800/1200 MPa), standard (DIN 912), driveType (internal-hex), and threadSize (M3-M24), enabling enhanced search results for engineers searching for high-tensile socket cap screws.
Technical Specifications
| Parameter | Specification |
|---|---|
| Standard | DIN 912 / ISO 4762 |
| Grades | 8.8, 12.9 |
| Thread Range | M3 – M24 (standard); M27–M36 (custom) |
| Length Range | 6mm – 200mm |
| Drive | Internal Hex (Allen) |
| Surface Treatment | Black Oxide (standard), Zinc Plated, Geomet/Dacromet |
| Material | Medium Carbon Steel (8.8), Alloy Steel (12.9), Quenched & Tempered |
| Thread Tolerance | 6g |
Applications
High-stress machinery assembly, automotive engine and chassis components, heavy equipment and mining machinery, hydraulic and pneumatic cylinder mounting, structural steel connections, tool and die components, and any critical application requiring maximum tensile strength from a DIN 912 socket cap bolt.
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