Steel Structure Fasteners for Structural and Heavy-Duty Construction
High-strength, high-torque, corrosion-resistant bolts.
Fasteners in Steel Structures
Fasteners are crucial components in steel structural connections. Their quality and performance determine the safety and lifespan of the overall structure.
At the connections between steel beams, columns, trusses, and joints, fasteners fulfill multiple roles, including load bearing, shear resistance, vibration resistance, loosening prevention, and corrosion protection.
- Connects steel members and gusset plates
- Transfers structural loads and stresses
- Maintains member position and overall stiffness
- Provides disassembly and maintenance capabilities
- Prevents vibration, fatigue, and environmental corrosion
BD Fasteners — Steel Structure Fastener Experts
Beyond Fastener is committed to providing professional fastener products and customized services to construction engineering companies, steel structure manufacturers, and EPC contractors. Whether it is standard parts or non-standard customization, we can provide corresponding solutions according to the engineering design drawings.
- Structural bolts (ASTM A325 / A490)
- High load-bearing capacity
- Corrosion-resistant coatings
We offer:
Custom specifications Large-scale production Fast quotation
Applications of Steel Structure Fasteners
Steel structure fasteners are widely used in:
- High-rise buildings and office buildings
- Industrial plants and warehouses
- Bridges and railway structures
- Stadiums and convention centers
- Wind power and photovoltaic steel racking systems
What Fasteners Are Used in Steel Structures?
Steel structures rely on high-strength fasteners to connect beams, columns, and load-bearing components. These fasteners must ensure structural stability under static and dynamic loads.
- Structural bolts (A325 / A490)
- Heavy hex bolts
- High-strength nuts
- Hardened washers
- Threaded rods
Torsion Shear Round Head Bolts
Grade 10.9S;
High strength, high torque and high temperature resistance.
High-Strength Large Hexagon Bolts
Grade 10.9S;
Durable, waterproof and rust-proof.
Nuts for Steel Structures
Phosphate-Coated
Phosphate-Coated Washers for Steel Structures
Phosphate-Coated
Types of Steel Structural Fasteners
| Fastener Type | Uses | Features |
| High Strength Bolts | Main beam and node connection | High tensile strength and strong bearing capacity |
| Friction Type Bolts | High stress connection parts | Relying on friction to transmit load |
| Shear Bolts | Truss and column connections | Excellent shear resistance |
| Nuts & Washers | Matching bolts | Anti-loosening, anti-slip, uniform force |
| Anchor Bolts | Foundation and columns | Fixed structure base |
| Chemical Anchors | Concrete steel structure connection | High adhesion and flexible construction |
| Custom Fasteners | Special nodes or special-shaped components | Customized structure, size, surface treatment |
Implementation Standards
Our fasteners come with:
- Material Test Certificate (MTC)
- Mechanical Properties Test Report
- Surface Corrosion Rating
- Factory Inspection Certificate
| Standard system | Standard No. | Performance level |
| ISO (International) | ISO 898-1 | 8.8 / 10.9 / 12.9 |
| DIN (Germany) | DIN 6914 / 6915 / 6916 | High-strength structural |
| GB (China) | GB/T 1228~1231 | Steel structure bolt assemblies |
| ASTM (USA) | ASTM A325 / A490 | High-strength structural bolts |
| EN (Europe) | EN 14399 series | Preloaded structural connection bolts |
Surface Treatment
| Process Type | Characteristic | Applicable environment |
| Hot-dip galvanized (HDG) | Thick coating ≥ 50μm, long corrosion resistance life | Outdoor, seaside, high humidity environment |
| Dacromet | Eco-friendly, chromium-free, salt spray resistant > 1000h | Seaports, bridges, coastal projects |
| Zn-Ni coating | Beautiful and cost-effective | Electrical and precision structures |
| Black oxidation / phosphating | Anti-rust and anti-seizure | Indoor structural parts |
Get a Reliable Steel Structure Fastener Supplier
Looking for high-quality structural fasteners?
Production and Testing
Manufacturing Process
- Raw material testing and heat treatment
- Cold heading or hot forging
- Thread rolling and precision machining
- Heat treatment (quenching and tempering)
- Surface coating and anti-corrosion treatment
- 100% appearance and dimensional inspection
Testing Items
- Tensile and yield strength tests
- Hardness and impact tests
- Thread accuracy and fit testing
- Salt spray and wet heat aging tests
- Friction coefficient verification
Why Beyond Fastener?
✅ High-strength materials and precision manufacturing
Materials include alloy steel, carbon steel, and stainless steel.
✅ Multi-standard compatibility
Supply according to international standards such as DIN, ASTM, GB, and EN.
✅ Flexible customization capabilities
Supporting special-shaped parts, non-standard parts, and small-batch production.
✅ Strict quality control
IATF 16949 & ISO 9001 certified.
✅ Global service and technical support
Providing drawing assistance and sample testing for engineering companies.
FAQ
What are structural bolts used for?
They are used in steel-to-steel connections in structural applications.
What is the difference between A325 and A490 bolts?
A490 bolts have higher strength and are used in more demanding applications.
Do you provide galvanized structural bolts?
Yes, we offer HDG and other coatings for corrosion resistance.