Ningyuan Fastener
Ningyuan Fastener
Explore our highly customized, industrial-grade mechanical components, manufactured under stringent ISO 9001 and EU quality standards.
By concentrating the force vector along the axis of the shank, Allen head bolts minimize structural bending moments. When tensioned to 70-80% of their yield strength, these bolts form a highly resilient joint capable of resisting dynamic shear loads, cyclic vibrations, and thermal expansions. For demanding applications, specifying the correct property class (e.g., Class 10.9 or Class 12.9 alloy steels) is critical to maintaining structural safety margins.
| Property Class | Material Composition | Nominal Tensile Strength (MPa) | Nominal Yield Strength (MPa) | Typical Industrial Applications |
|---|---|---|---|---|
| Class 8.8 | Medium carbon steel, quenched and tempered | 800 | 640 | General machinery, structural frames, brackets |
| Class 10.9 | Alloy steel (e.g., 40Cr, SCM435), quenched and tempered | 1000 | 900 | Automotive chassis, high-stress piping, engine mounts |
| Class 12.9 | High-alloy steel, meticulously heat treated | 1200 | 1080 | Heavy aerospace components, turbines, tool-and-die setups |
| Stainless Steel (A2 / A4) | Austenitic stainless steel (304 / 316 grade) | 500 - 700 | 210 - 450 | Marine fittings, chemical processing, solar outdoor racks |
| Nylon (Polyamide) | Reinforced Nylon 66 / polymer blends | 60 - 80 | N/A (elastic range) | Electronics, non-magnetic enclosures, consumer goods |
From solar power stations exposed to high winds, to underground utility corridors requiring structural seismic support, Ningyuan products are engineered to excel in critical fields.
Our C-shaped steels, hot-dip galvanized bolts, and square brackets form the structural backbone of utility-scale ground-mounted and rooftop solar farms, designed to withstand continuous wind shear and environmental moisture.
Securing building electromechanical structures against seismic activities requires load-tested seismic support arms, heavy anchors, and vibration-proof connecting nuts that maintain integrity during emergency vibrations.
In heavy industrial gearboxes, pumps, and structural frameworks, our high-tensile Allen Head and countersunk bolts withstand high torque preloads to keep parts clamped and reduce downtime.
Underground corridors contain essential utility lines. Our structural channels, anchors, and flange nuts offer reliable load capacities and resist damp air and corrosive gases.
Why procurement teams in Europe, the Americas, and Southeast Asia choose Ningyuan for high-volume fastener programs.
Deep experience in high-tensile threads, cold heading, and custom fasteners, with an annual output exceeding 60 million pieces.
Certified under ISO 9001 and military quality frameworks, ensuring compliance with RoHS, GB/T30512, and EU ELV regulations.
We supply free samples for standard configurations, allowing design engineers to test dimensions and tensile strength before scaling.
Our engineering department offers support with joint calculations, torque-tension testing, coating selections, and installation guides.
A complete selection of C-shaped steels, anchors, structural brackets, and specialized self-drilling fasteners.
Undergoing regular audits, our production quality management is aligned with international standards, ensuring traceability and reliability.
Answers to key engineering questions regarding fastener specifications, metallurgy, and global shipping.
While DIN 912 and ISO 4762 are generally considered interchangeable in everyday practice, there are slight dimensional deviations, particularly in head tolerances, shank lengths, and hex socket depths for specific nominal thread diameters (such as M1.4, M18, M22, and M24). ISO 4762 is the modern global standard, whereas DIN 912 remains widely cited in European and heavy machinery blueprints. Ningyuan manufactures to both standards, providing detailed Mill Test Reports (MTR) according to EN 10204 3.1 to guarantee compliance with your specific mechanical designs.
Class 10.9 steel possesses a nominal tensile strength of 1000 MPa and a yield strength ratio of 90% (900 MPa). Class 12.9 is a higher alloy steel, heat-treated to achieve a nominal tensile strength of 1200 MPa and a yield strength of 1080 MPa. Class 12.9 offers higher fatigue limits and clamping force, but it has lower elongation properties (is more brittle) and is more susceptible to hydrogen embrittlement. In highly corrosive environments or applications prone to dynamic shocks, Class 10.9 paired with a specialized zinc-flake coating is often preferred over uncoated Class 12.9.
Hydrogen embrittlement is a failure mode where high-tensile steels (typically those exceeding 320 HV or 1000 MPa tensile strength, such as Class 10.9 and 12.9) become brittle due to the absorption of atomic hydrogen during acid pickling or electroplating. To prevent this, Handan Ningyuan implements strict post-plating baking protocols (hydrogen relief baking at 200°C within 4 hours of plating) or utilizes mechanical plating and non-acidic chemical coatings like zinc-flake (Dacromet/Geomet), which do not generate atomic hydrogen during processing.
Nylon 66 hexagon socket bolts are ideal for applications requiring low weight, non-magnetic properties, chemical resistance, and electrical insulation. Unlike carbon steel or stainless steel, nylon does not corrode in acidic or saline solutions, making it standard for circuit board mounts, chemical vats, marine electronics, and medical imaging chambers. However, they lack the tensile strength of metal fasteners and should only be used in low-load assemblies.
European directives like RoHS (Restriction of Hazardous Substances) and the 2000/53/EC ELV (End-of-Life Vehicles) regulation restrict the use of heavy metals, specifically hexavalent chromium (Cr6+), which was historically used in yellow passivation coatings. Ningyuan uses trivalent chromium (Cr3+) passivation and zinc-flake systems that are completely free of hexavalent chromium, lead, cadmium, and mercury, ensuring your imported shipments comply with EU and US customs regulations.
For standard configurations (such as standard carbon steel DIN 912 socket head cap screws), we maintain inventories that can ship within 7-10 working days. For custom designs involving specialized tooling, non-standard pitches, or custom lengths, the manufacturing cycle typically ranges between 20 to 30 days. The MOQ depends on the bolt diameter and material grade; standard sizes generally require a lower threshold, while specialized alloys (like SCM435) are structured around standard production run sizes to optimize cost efficiency.
A further list of our high-quality structural nuts, ground anchors, and specialized sheet metal fasteners.
In the future, Ningyuan people will continue to adhere to the enterprise philosophy that development is the direction and hard work is the truth. With rich experience, excellent technology, excellent quality, excellent service, strict standards, for each partner to provide the best quality products and system solutions.
When you are keen on any of our products, please feel free to contact with us. You can reach us out via phone, email and SNS etc., we will response to you as soon as possible.
