Casting direct fasteners
Category:
Keywords:
On-demand processing and customization factory wholesale with sufficient inventory
Overview
Our Casting Direct Fastener is an industrial-grade linear connection core engineered for seamless, high-load straight-line assembly across construction, industrial machinery, infrastructure, and modular frame projects. Crafted from premium ductile iron (QT450-10) or cast carbon steel (ZG230-450) via sand casting or investment casting processes, this fastener features a one-piece design that enables coaxial alignment of steel pipes, profiles, or structural components—delivering exceptional load-bearing capacity, structural rigidity, and corrosion resistance. Designed for contractors, equipment manufacturers, and project engineers, it is the ideal choice for extending structural lengths, reinforcing linear connections, and building modular frameworks where straight-line force transmission and stability are critical.
Key Features
One-Piece Cast Direct Structure: Precision casting process creates a monolithic, seamless body with coaxial connection ports, eliminating welded joints or assembled components that cause stress concentration and fatigue failure. The integrated design ensures uniform load transfer along the linear axis.
High-Strength Linear Load-Bearing: Optimized structural geometry with reinforced mid-section ribs distributes axial and radial loads evenly, supporting static loads up to 6 tonnes (ZG230-450 variant) and shear loads up to 2.5 tonnes—outperforming stamped or welded direct fasteners.
High-Toughness Cast Material: Ductile iron (QT450-10) offers excellent impact resistance (10% elongation) and ductility, avoiding brittle fracture in dynamic load scenarios. Cast carbon steel (ZG230-450) delivers enhanced tensile strength (≥450 MPa) for heavy-duty linear connections.
Multi-Layer Anti-Corrosion Protection: Undergoes a three-stage surface treatment: shot blasting for surface purification, anti-rust primer coating, and final hot-dip galvanization (≥100μm) or epoxy powder coating. 304 cast stainless steel variants with passivation treatment ensure long-term durability in coastal, humid, or mild chemical environments.
Precision-Machined Coaxial Interfaces: Connection ports are CNC-machined to tight tolerances (±0.2mm) and coaxiality error ≤0.1mm, ensuring gap-free alignment of connected components. The smooth inner surface reduces friction and wear, extending the service life of both the fastener and connected pipes/profiles.
Universal Compatibility & Quick Installation: Compatible with standard steel pipes (DN20–DN150) and square/rectangular profiles (25×25mm–120×120mm); paired with 8.8 grade high-strength bolts and lock nuts for tool-friendly assembly—no welding required, reducing on-site installation time by 40%.
Product Specifications
|
Parameter |
Specification |
|
Core Materials |
Ductile Iron (QT450-10), Cast Carbon Steel (ZG230-450), 304 Cast Stainless Steel |
|
Casting Process |
Sand Casting (large batches/heavy components), Investment Casting (precision/small parts) |
|
Surface Treatment |
Hot-Dip Galvanization (HDG ≥100μm), Epoxy Powder Coating, Passivation (stainless steel) |
|
Tensile Strength |
QT450-10: ≥450 MPa; ZG230-450: ≥450 MPa |
|
Connection Type |
Linear Direct Connection (Coaxial Alignment) |
|
Compatible Sizes |
DN20–DN150 (Round Pipe); 25×25mm–120×120mm (Square/Rectangular Profile) |
|
Load Capacity |
Static Load: ≤6 Tonnes (ZG230-450); ≤4 Tonnes (QT450-10); Shear Load: ≤2.5 Tonnes |
|
Dimensional Tolerance |
Casting: ±0.5mm; Machined Surfaces: ±0.2mm; Coaxiality Error: ≤0.1mm |
|
Fastener Length |
50mm–200mm (Customizable based on pipe/profile thickness) |
|
Matching Accessories |
8.8 Grade High-Strength Bolts, Lock Nuts, Hardened Washers, Anti-Slip Gaskets |
|
Compliance |
EN 74-2, GB/T 15831, ISO 1083 (Casting Standards), ISO 898-1 (Fastener Standards) |
Advantages
Superior Linear Load Transmission: One-piece cast structure and coaxial design ensure direct, lossless force transfer along the linear axis, avoiding load dispersion caused by misalignment or weak joints.
Design Flexibility for Custom Sizes: Casting process enables easy customization of length, port diameter, and reinforcing rib design—ideal for non-standard pipe/profile connections and specialized linear frameworks.
Cost-Effective Heavy-Duty Performance: Lower tooling costs than forging for complex linear structures; durable cast material reduces replacement frequency, minimizing long-term maintenance costs.
Simplified Assembly & Retrofit: Tool-friendly bolted installation eliminates welding; compatible with existing structural components, enabling seamless retrofitting and extension of frames, pipelines, or supports.
Long Service Life: Multi-layer corrosion protection and wear-resistant machined interfaces extend service life to 10–15 years in outdoor and industrial environments, ensuring reliable performance for long-term projects.
Application Scenarios
Construction & Scaffolding: Linear extension of scaffolding pipes, reinforcement of long-span frame structures, straight-line connection of formwork supports, and extension of temporary shoring systems.
Industrial Machinery: Linear frame assembly for conveyor systems, production line modular components, heavy equipment linear supports, and pipe extension in industrial piping systems.
Infrastructure & Municipal Works: Road guardrail linear connections, street lamp pole extension, bridge auxiliary structure straight-line assembly, and municipal pipeline reinforcement.
Agricultural & Horticultural: Greenhouse frame linear extension, farm equipment long-span supports, and irrigation pipeline straight-line connectors.
Storage & Logistics: Warehouse rack linear frame reinforcement, pallet rack extension, and heavy-duty shelf straight-line connection nodes.
Marine & Coastal Projects: 304 cast stainless steel direct fasteners for boat dock linear supports, coastal guardrail extensions, and marine pipeline connections—resisting saltwater corrosion.
Why Choose Our Casting Direct Fastener?
Linear Connection Specialization: Optimized for straight-line assembly, ensuring superior load transmission and alignment accuracy unmatched by multi-component connectors.
Casting Process Advantages: Combines design flexibility (custom sizes/shapes) with cost-effectiveness for small-to-medium batches, supporting non-standard project requirements.
Strict Quality Control: Every unit undergoes casting defect inspection (X-ray/ultrasonic), coaxiality testing, load-bearing verification, and dimensional calibration to ensure reliability.
Universal Compatibility: Matches standard industrial pipes and profiles, enabling seamless integration with existing systems and reducing procurement complexity.
Global Compliance: Meets international casting and fastener standards, ensuring compatibility with global construction, machinery, and infrastructure projects.
Package Includes
Casting Direct Fasteners (packaged in anti-rust VCI bags, separated by foam to prevent collision damage)
Complete Matching Accessories: 8.8 Grade High-Strength Bolts, Lock Nuts, Hardened Washers, Anti-Slip Gaskets
Quality Certification Documents: Material Test Report (MTR), Casting Defect Inspection Report, Coaxiality Test Certificate
Installation Manual (including assembly steps, torque specifications, and safety precautions)
Optional: Custom Labeled Packaging (by part number, size, or project) for easy inventory management
Service & Support
Custom Casting Service: Full-cycle customization from design optimization (for casting feasibility) to die making, casting, machining, and surface treatment—supports 2D/3D drawing input and non-standard size development.
Bulk Order Program: Volume-based pricing for large construction or machinery projects; dedicated production scheduling to ensure on-time delivery.
Technical Design Support: Engineers provide free design optimization for load distribution, coaxiality, and cost reduction for bulk orders.
Quality Assurance: 3-year warranty against manufacturing defects (casting cracks, coaxiality deviation, dimensional errors); third-party inspection (SGS, BV) available upon request.
After-Sales Support: 24/7 online guidance for installation, maintenance, and replacement; on-site technical service for large-scale project applications.
Craftsmanship quality
Physical manufacturer
Carefully selected materials
Precision machining
Customized on demand
Sufficient inventory
Considerate after-sales service
Reasons to choose us
Our factory customizes product sizes. For specific details, please communicate with our customer service in detail.
Selected materials are used for processing, with advanced production equipment and proficient production techniques.
An offline physical manufacturer integrating design, research and development, production and sales, without any middlemen.
FAQ
We have collected some frequently asked questions to help you better understand our company, our capabilities, our products and services.
What types of construction equipment can I customize?
We support customization of various construction equipment such as scaffolding, construction baskets, tower crane accessories, etc. No matter the size, material, or function, they can be customized according to your needs, and special functions can also be specially developed.
Who provides the design drawings for customized products?
You can provide preliminary ideas or sketches, and our professional team will refine the design accordingly; Our team can also design directly according to your needs, and we will communicate with you multiple times to optimize the process until you are satisfied.
Does the customized product support compatibility with existing devices?
We will fully consider compatibility. Before customization, we will understand the condition of your existing equipment, and conduct compatibility testing after customization to ensure seamless integration with your existing building equipment and construction systems.
How to determine the price of customized products?
Pricing is based on comprehensive factors such as product complexity, raw material costs, and production process difficulty. A detailed cost breakdown quotation will be provided during the scheme design phase to ensure transparency and reasonableness.
Is there a discount for mass customization?
Normally, the larger the order quantity, the lower the unit cost, and corresponding price discounts will be given. The specific discount amount can be discussed in detail during the communication of demand.
Does the price include transportation costs?
The default quotation does not include transportation costs. The transportation method and destination are different, and the cost may vary. After determining the transportation plan, the freight cost will be clarified.
Solutions For All Your Product Needs
As a leading manufacturer and exporter in the construction equipment industry, we are committed to providing high - quality, innovative, and reliable products to customers worldwide.
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