-
-
-
-
WeChat
-
whatsapp
Products
Universal structural fastening
Engineering universal structural fastenings for severe operating conditions. ISO 9001 certified foundry offering custom casting (clay sand/shell molding) for the US, EU and South American markets. High strength, corrosion resistance, conforms to ASTM/DIN standards. Request a quote.
Description
marker
Universal Structural Fastenings | Custom Cast Steel and Cast Iron Connectors for Industrial Structures | Qingdao Zhaoyuqi Mechanical Engineering
Product Description
Title: Versatile and reliable structural fastenings for complex engineering tasks
Qingdao Zhaoyuqi Mechanical Engineering Company defines "universal structural fastenings" as high-integrity fastening components designed to connect various structural elements in industry, construction and energy. Unlike mass-produced standard fasteners, our fasteners are manufactured using advanced sand casting and shell molding technologies to meet specific load, geometry and service requirements.
Founded in 2014, our foundry specializes in transforming complex engineering drawings into reliable metal components. Whether you need rugged assemblies for steel structures, custom mounting brackets for heavy equipment, or adaptable connectors for piping systems, our universal fasteners provide the flexibility of custom manufacturing with the reliability of industrial casting. We serve customers throughout North America, Europe and South America, ensuring every product meets strict international safety and quality standards.
Key features and unique performance characteristics
Adaptive Geometry: Using our gasification casting and tooling capabilities, we create fasteners to accommodate custom beam profiles, irregular angles and unique connection points without the need for costly on-site welding.
High Load Capacity: Manufactured from high quality ductile iron (QT450/QT500) or carbon steel, our fasteners are heat treated to provide superior tensile strength and toughness, suitable for dynamic loads.
Precision machined interfaces: Critical contact surfaces and threaded holes are CNC machined after casting, ensuring perfect alignment and reliable bolted connections, reducing installation time and reducing the likelihood of errors.
Corrosion and Weather Resistant: Available coating options include hot-dip galvanizing, galvanizing or epoxy powder coating, making them ideal for outdoor, marine or chemical applications.
Material Traceability: Each batch comes with full materials certification, tracing the origin of raw materials to comply with US metal tariffs and the EU cross-border carbon adjustment mechanism.
Applications and industries
Our universal structural fastenings are essential components in:
Industrial Construction: Connecting steel beams, columns and trusses in warehouses, factories and commercial buildings.
Energy and Infrastructure: Mounting supports for solar panels, wind turbine components and substation structures.
Oil and gas and petrochemical industry: Pipe supports, brackets for fastening fittings and structural components in aggressive environments.
Heavy Engineering and Equipment: Base supports and articulation connectors for mining equipment, agricultural equipment and conveyor systems.
Shipbuilding and Offshore: Corrosion resistant connections for shipbuilding and offshore platforms (requires special coating/material).
Operating principle and engineering logic
Structural integrity through precision casting
The “versatility” of our fasteners lies in their ability to evenly distribute stress across connection points.
Load Transfer: The cast body acts as a rigid assembly, transferring tensile, compressive and shear forces from one structural element to another.
Stress Distribution: Optimized stiffener and wall thickness design (verified by finite element analysis if necessary) prevents stress concentration, reducing the risk of fatigue failure.
Secure Connection: Machined surfaces provide tight bolted connections, minimizing micro-movement and vibration loosening.
Environmental Protection: The dense microstructure of our castings, combined with protective coatings, resists the penetration of moisture and chemicals, maintaining structural integrity for decades.
Customized solutions and production process
From idea to component: our foundry process
Design and Engineering Analysis: Submit your 2D/3D drawings (STEP, IGES, PDF). Our engineers evaluate manufacturability and propose optimizations for cost and strength.
Tooling Making: We use CNC machined wood or resin models for the clay-sand or shell process, or foam models for gasification casting.
Molding and Pouring: Automated molding lines ensure consistent sand density. Molten metal is poured at a controlled temperature to prevent defects.
Heat treatment: Normalization or annealing relieves internal stresses, increasing ductility and toughness.
CNC Machining: Critical surfaces and threads are machined with high precision.
Surface Treatment and Quality Control: Final cleaning, coating and strict inspection (dimensional, visual and mechanical testing).
Product structure and composition of materials
Main material:
Ductile Iron (GGG-40/QT450): Excellent combination of strength and ductility, ideal for general structural applications.
Carbon Steel (WCB/A105): Higher tensile strength for high load applications.
Stainless steel (CF8M/316): For extreme corrosion resistance.
Microstructure: Controlled nodularity of graphite (for ductile iron) provides high toughness.
Coating system:
Zinc layer: Tread protection.
Epoxy/Polyester Powder: Barrier protection against UV and chemicals.
Why choose Qingdao Zhaoyuqi Mechanical Engineering?
Direct Manufacturer Advantage: As a manufacturer founded in 2014, we cut out the middleman by offering competitive prices and direct communication with our engineering team.
Expert knowledge of export regulation: We are fully prepared for the 2026 US metal tariff rules and the EU cross-border carbon adjustment mechanism. Upon request, we provide detailed carbon footprint data and documentation of the origin of materials for smooth customs clearance.
Flexible Manufacturing: Our combination of clay sand, shell molding and gasification casting lines allows us to efficiently process small prototype runs to high-volume orders.
Global Experience: Proven success in exporting to Germany, USA, Brazil and Chile with a focus on on-time delivery and consistent quality.
Quality Assurance and Certificates
ISO 9001:2015 certified: Our quality management system ensures continuous process control.
Material testing: Each batch undergoes chemical analysis and testing of mechanical properties (tensile strength, yield strength, hardness).
Dimensional Control: Coordinate measuring machine and hand gauges ensure compliance with drawing tolerances.
Non-Destructive Testing: Magnetic particle testing or ultrasonic testing is available upon request for critical components.
Factory Test Certificates: Provided with every shipment and traceable back to the original heat.
Logistics, packaging and delivery
Packing:
Standard: Sturdy cardboard boxes with internal dividers for small parts.
Heavy: Wooden pallets with metal strapping and shrink film for larger mounts.
Customized: Crate packaging is available upon request for oversized or particularly sensitive components.
Delivery terms: FOB Qingdao, CIF, DDP to the main ports of the world.
Production time:
Samples/prototypes: 10-15 days.
Mass production: 20–35 days depending on complexity and volume.
Minimum Order: Flexible. Low minimum order for trial batches; discounts for large volumes for bulk purchases.
Frequently Asked Questions
Yes, customization is our core competency. Send us your 2D/3D files and our engineering team will provide a manufacturability analysis and quotation.
Email:sunny@zyqfoundry.com
WhatsApp: +86-15275237708
contact us
Related Popular Products
Cast iron nut
In the vast field of industrial fasteners, cast iron nuts are a basic but extremely important component. Due to their high cost-effectiveness and stable mechanical properties, they are widely used in various structural connections that require strength while being cost-sensitive.
Pipe fittings
As key fittings designed for water and wastewater systems, municipal piping, building plumbing and other critical applications, our premium cast iron fittings are produced by sand casting from molten cast iron.
Hanging connector
Our sand cast hanger clamp is a durable, specialized line fitting designed for overhead power lines, substation busbar systems and new energy grid connections.
Valve handwheel
Durable industrial handwheels for gate valves, gate valves and butterfly valves. High-strength options in cast iron, steel and aluminum with precision machined hubs. ISO 9001 certified manufacturer offering OEM/ODM services. Global delivery from Qingdao, China.
Clamp for guy wires
Our sand cast transmission guy guy clamp is a heavy duty anchorage specifically designed for overhead distribution lines, transmission towers and pole stabilization systems.
Spare parts for pumps
In industrial hydraulic systems, key components of pumps and valves are critical factors that determine the pressure load capacity, tightness and service life of the entire equipment.
Hanging clamp
Our sand cast overhead power line clamp is a high-performance precision load-bearing and fixing element designed for overhead power lines, distribution networks and substation overhead systems around the world.
Parts for agricultural machinery
Agricultural machinery operates in harsh field conditions with high loads, where the reliability of spare parts directly determines uptime and harvesting efficiency.
car rocker arm
Rocker arms made of high quality cast iron for automobile engines. Made from high-strength cast iron grades QT450/QT500 with CNC-machined working surfaces. The foundry is ISO 9001 and IATF 16949 certified. High fatigue strength and wear resistance. Export worldwide from Qingdao, China.
Accessories for mining equipment
Gray cast iron (SCh250, SCh300) is widely used for machine frames, engine blocks and body parts due to its good machinability and ability to dampen vibrations.
Fork plate
Our sand-cast power connection plate is a critical load-bearing element of linear reinforcement, specially designed for overhead power lines, substation insulation hangers and suspension systems in renewable energy power grids.
Clay sand casting
Clay sand casting is the most common and inexpensive traditional sand casting process, commonly known as wet earth casting. The main raw materials include quartz sand, bentonite clay, water and coal dust.
Washer
Our sand casting force washer is a heavy load transfer element specially designed for power line fittings, substation equipment and support structure connections.
Bollard
Cast iron mooring bollards are essential mooring devices widely installed on quays, piers and jetties to reliably transfer mooring forces from moored vessels to the pier structure.
Sidewalk bracket
Our sand-cast sidewalk power pole bracket is a heavy-duty load-bearing mounting mount specifically designed for urban sidewalk power poles, street lighting systems and public distribution facilities.
Valve handle
High quality industrial handles and handwheels for gate valves, gate valves and butterfly valves. Made from durable cast iron, steel and aluminum. ISO 9001 certified, ergonomic design, API/ISO compliant. Customized OEM/ODM service is available. Export worldwide.