HIGH TENSILE
BOLTS MANUFACTURER
Reliable Grade 8.8, 10.9, and 12.9 fastening solutions for industrial and structural applications. Exporting certified quality to 50+ countries worldwide.
Quick Specifications
- Diameter Range
- M6 - M48
- Length Range
- 10mm - 600mm
- Grades
- 8.8 / 10.9 / 12.9
- Standards
- DIN / ISO / ASTM / EN
- Surface Finish
- Zinc, Black, HDG, Dacromet
- Thread
- Metric & Inch
COMPLETE RANGE OF HIGH TENSILE BOLTS
We manufacture a complete range of high tensile bolts designed for demanding industrial and structural applications worldwide. Produced according to international standards for reliable mechanical properties.
Hex Bolts
Full Thread / Partial Thread. Standard high tensile bolts for general industrial fastening.
- Grades: 8.8, 10.9, 12.9
- DIN 931/933, ISO 4014/4017
Socket Head Cap Screws
Precision high tensile socket head cap screws for machinery and equipment assembly.
- Grades: 10.9, 12.9
- DIN 912, ISO 4762
Hex Flange Bolts
Designed for vibration resistance and improved load distribution with integral washer face.
- Grades: 8.8, 10.9
- DIN 6921, ISO 4162
Countersunk Socket Screws
High tensile screws designed for flush installation in precision applications.
- Grades: 10.9, 12.9
- DIN 7991, ISO 10642
Stud Bolts / Threaded Rod
Heavy-duty stud bolts for industrial and structural use. Custom lengths available.
- ASTM A193 B7
- DIN 975, DIN 976
Nuts & Washers
Matched high tensile nuts and washers designed for reliable preload performance.
- DIN 934, ISO 4032
- DIN 125, EN 14399
Technical Specifications
| Diameter | M6 - M48 |
|---|---|
| Length | 10mm - 600mm |
| Grade | 8.8 / 10.9 / 12.9 |
| Material | Alloy Steel / Carbon Steel |
| Thread | Metric / UNC / UNF |
| Surface Finish | Zinc, Black, HDG, Dacromet |
Mechanical Properties (ISO 898-1)
| Property | Grade 8.8 | Grade 10.9 | Grade 12.9 |
|---|---|---|---|
| Tensile Strength | ≥800 MPa | ≥1040 MPa | ≥1220 MPa |
| Yield Strength | ≥640 MPa | ≥940 MPa | ≥1100 MPa |
| Proof Load | 600 MPa | 830 MPa | 970 MPa |
| Hardness (HRC) | 22-32 | 32-39 | 39-44 |
*Values are minimum requirements according to ISO 898-1 unless otherwise stated.
INTERNATIONAL STANDARDS
Our high tensile bolts are compliant with major global standards, ensuring safety and compatibility for international projects. We support documentation required for CE marking and structural applications.
European Market
EN 14399, EN 15048, CE Available
North America
ASTM A325, A490, A193 B7
Global
ISO 898-1, DIN Standards
Quality System
ISO 9001 Certified
Export Documentation
-
EN10204 3.1 Mill Test Certificate Chemical composition & mechanical properties.
-
Raw Material Traceability Full tracking from steel mill to finished bolt.
-
Third-Party Inspection SGS / TUV / BV inspection available upon request.
MANUFACTURING EXCELLENCE
Strict production control from raw material to final inspection ensures every bolt meets the specified load capacity.
Raw Material
Forging
Thread Rolling
Heat Treatment
Surface Coating
Inspection
100% QUALITY ASSURANCE
Our in-house laboratory performs rigorous testing for every batch.
INDUSTRY APPLICATIONS
Heavy Machinery
Mining & Construction Equip.
Steel Structures
Bridges & Infrastructure
Energy Projects
Wind Power & Oil/Gas
Automotive
Trucks & Railways
WHY CHOOSE OUR BOLTS
Stable Mechanical Performance
Strict heat treatment control ensures consistent strength and ductility across all batches.
Reliable Delivery Time
Large raw material stock and efficient production lines allow for 15-35 day delivery.
Global Export Experience
Professional export packaging and documentation for USA, Germany, UAE, and 50+ countries.
Main Export Markets
We understand the specific requirements of different markets, from ASTM structural standards in North America to EN/DIN requirements in Europe.
Factory Direct Price
No trading company markup. OEM manufacturing available.
FREQUENTLY ASKED QUESTIONS
What grades of high tensile bolts do you supply?
Can you provide mill test certificates?
What is your delivery time?
Do you support custom bolts (OEM)?
Get a Quote
Send us your inquiry today. Our engineers will review your requirements and provide a detailed quotation within 12 hours.
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Response Time
Within 12 Hours
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