Construction Fasteners
Structural fasteners for building and infrastructure
Carbon steel and stainless steel fasteners for structural steel connections, building facades, and infrastructure projects. Thread sizes M8-M24, material grades 8.8/10.9/12.9, surface treatments: zinc plating (240-480h), zinc-nickel (720-1000+h), hot-dip galvanizing, stainless steel. Compliant with ISO 898-1, ASTM A325/A490, EN 14399.
Application Specifications
Structural Steel Connections
Beam-to-column connections, bracing connections. Typical thread sizes: M12-M24. Preload requirements per EN 1090-2. Torque values per EN 14399-1.
Building Facade Systems
Curtain wall attachments, cladding support systems. Typical loads: 1.0-5.0 kN per fastener. Wind load compliance per EN 1991-1-4. Thermal expansion considerations.
Infrastructure Projects
Bridge construction, highway structures, tunnels. Corrosion protection per ISO 12944 (C4-C5). Minimum service life: 25-50 years per project requirements.
Foundation Anchor Bolts
Concrete embedment anchors, base plate connections. Typical embedment depth: 10-20× bolt diameter. Concrete strength requirements: C25-C40 per EN 1992.
Coastal and Marine Structures
Harbor facilities, coastal buildings. Corrosion classification: C5-M per ISO 12944. Material options: 316 stainless steel or zinc-nickel plating (1000+h salt spray).
Technical Specifications
Structural Requirements
- •Tensile strength: Grade 8.8 (800 MPa), Grade 10.9 (1000 MPa), Grade 12.9 (1200 MPa)
- •Yield strength: Grade 8.8 (640 MPa), Grade 10.9 (900 MPa), Grade 12.9 (1080 MPa)
- •Preload: Per EN 14399-1 (HR system) or EN 14399-2 (HV system)
- •Thread tolerance: 6g per ISO 965-1
Environmental Conditions
- •Corrosion classification: C3-C5 per ISO 12944
- •Operating temperature: -40°C to +80°C
- •Humidity: Up to 100% RH (coastal applications)
- •Chemical exposure: Per project specifications
Coating Specifications
- •Zinc plating: 8-15 μm per ISO 4042
- •Zinc-nickel plating: 8-15 μm (10-15% Ni)
- •Hot-dip galvanizing: 50-100 μm per ISO 1461
- •Coating adhesion: Per ISO 2409
Common Construction Fastener Specifications
| Property | Value | Note |
|---|---|---|
| Thread Sizes |
| Custom sizes available |
| Materials |
| Grade 8.8, 10.9, 12.9 available |
| Surface Treatment |
| Per application requirements |
| Salt Spray Resistance |
| ASTM B117 |
| Fastener Types |
| Custom designs available |
Surface Treatment Options
Surface treatment options per ISO standards. Coating specifications, corrosion classification, and service life data provided per application requirements.
Zinc Plating
Electroplated zinc coating per ISO 4042. Coating thickness: 8-15 μm. Salt spray resistance: 240-480 hours per ASTM B117. Trivalent chromium passivation (Cr3+) per RoHS.
Technical Specifications:
- Coating thickness: 8-15 μm per ISO 4042
- Passivation: Cr3+ trivalent chromium
- Corrosion classification: C3 per ISO 12944
- Service life: 10-15 years (C3 environment)
Typical Applications:
- Indoor structural connections (C3)
- Standard building construction
- Covered/protected applications
Zinc-Nickel Plating
Electroplated zinc-nickel alloy coating. Nickel content: 10-15% by weight. Coating thickness: 8-15 μm. Salt spray resistance: 720-1000+ hours per ASTM B117.
Technical Specifications:
- Coating thickness: 8-15 μm
- Alloy composition: 85-90% Zn, 10-15% Ni
- Corrosion classification: C4-C5 per ISO 12944
- Service life: 20-25 years (C4 environment)
Typical Applications:
- Coastal construction (C5)
- Outdoor structures (C4)
- High-humidity regions
- Long-term warranty requirements
Hot-Dip Galvanizing
Hot-dip galvanized coating per ISO 1461. Coating thickness: 50-100 μm. Corrosion protection for structural steel applications. Suitable for C4-C5 environments.
Technical Specifications:
- Coating thickness: 50-100 μm per ISO 1461
- Coating weight: ≥610 g/m² per ISO 1461
- Corrosion classification: C4-C5 per ISO 12944
- Service life: 25-50 years (C4 environment)
Typical Applications:
- Structural steel connections (C4-C5)
- Outdoor infrastructure
- Bridge construction
- Heavy-duty applications
Stainless Steel
Austenitic stainless steel fasteners per ISO 3506-1. Grades: 304 (1.4301) or 316 (1.4401). No coating required. Suitable for C5-M (marine) environments.
Technical Specifications:
- Material grade: 304 (1.4301) or 316 (1.4401)
- Mechanical properties: Per ISO 3506-1
- Corrosion classification: C5-M per ISO 12944
- Service life: 50+ years (C5-M environment)
Typical Applications:
- Marine/coastal environments (C5-M)
- Chemical exposure areas
- 25+ year service life requirements
- Aesthetic applications
Quality & Engineering
Material Traceability
Material certificates (3.1 per EN 10204) available. Batch tracking with heat numbers. Chemical composition and mechanical property reports per ISO 898-1.
- • Mill certificates (3.1) per EN 10204
- • Heat number traceability
- • Chemical composition per ISO 898-1
Coating Process Control
Coating thickness measurement per ISO 1463 (magnetic method) or ISO 1461 (hot-dip). Salt spray testing per ASTM B117. Process control per ISO 9001:2015.
- • Thickness measurement: ISO 1463 / ISO 1461
- • Salt spray: ASTM B117
- • Adhesion testing: ISO 2409
Testing & Certification
Third-party testing available. Test reports per ISO/IEC 17025. Compliance with EN 1090-2 (CE marking) available.
- • Salt spray: ASTM B117
- • Mechanical properties: ISO 898-1
- • CE marking: EN 1090-2 (if required)
OEM / ODM Capability
Custom Specifications
- • Thread specifications: Metric (ISO 965), Imperial (UNC/UNF)
- • Head types: Hex (ISO 4014/4017), Socket (ISO 4762), Flange (ISO 16651)
- • Length tolerance: ±2mm per ISO 4759-1
- • Coating options: Zinc, zinc-nickel, hot-dip galvanizing, stainless steel
- • Material grades: 8.8, 10.9, 12.9 per ISO 898-1
- • Preload systems: HR (EN 14399-1) or HV (EN 14399-2)
Packaging & Documentation
- • Bulk packaging: Cartons, pallets (per project requirements)
- • Labeling: Barcode (Code 128), QR code, batch numbers, heat numbers
- • Documentation: Material certificates (3.1), test reports, packing lists
- • MOQ: Standard sizes 1,000-5,000 pcs; Custom specs negotiable
- • Project labeling: Per EPC contractor requirements
Frequently Asked Questions
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