Ningyuan Fastener
Ningyuan Fastener
Engineered standard and custom components built with high-grade materials for critical structural, electronic, and photovoltaic assemblies.
Fillister head screws (sometimes called cheese head screws in alternative specifications, though differing slightly in geometry) are unique cylindrical fasteners characterized by an elevated profile. They feature a high, deep-slotted or recessed head with a slightly convex or rounded top surface and a flat seating underside. This structural geometry offers key advantages in deep-counterbore applications, ensuring the driver has robust purchase within the recess without compromising structural head thickness.
In global supply chains, procuring these components from certified industrial manufacturers in China ensures compliance with international standards (such as ISO 1207, DIN 85, DIN 7985, and ANSI/ASME B18.6.3) while lowering per-unit component overhead through vertically integrated cold-heading manufacturing.
Formerly established as Jin Langtao in 2005, Handan Ningyuan Fastener Manufacturing Co., Ltd. underwent a major corporate modernization and expansion in 2016. Today, we are located in Handan Yongnian—reputed globally as China's absolute Fastener Capital.
Over eighteen years of dedication has forged a modern, high-tech industrial enterprise. Our vertically integrated layout features a dedicated research and development department, a state-of-the-art production hub, and an active international sales team. Our robust portfolio spans high-end fasteners, solar photovoltaic racking mounting accessories, seismic steel brackets, high-tensile architectural bolts, self-drilling screws, and custom dry wall fastening systems.
Hard metrics showing our manufacturing capacities, scientific output, and global distribution footprint.
Analyzing the rising adoption of Fillister Head Screws in mechanical design, electrical insulation, and international manufacturing corridors.
Fillister head bolts and screws play a key role in mounting solar photovoltaic brackets, tracking systems, and electrical enclosures. Their deep slots prevent driver slippage during automated field installations where high torque is mandatory.
With the surge in electric vehicles (EV) and smart grids, compact space-saving fasteners are in high demand. Fillister profiles recess neatly within counterbored cavities, saving weight and volume inside electrical gearboxes and power distribution units.
To align with global circular economy goals, factories now offer advanced surface coatings like hot-dip galvanization, eco-friendly zinc plating, and RoHS/ELV compliant non-hexavalent passivation systems.
Comprehensive standard cross-reference chart for design engineers selecting head heights, diameters, and mechanical tolerances.
| Nominal Size (d) | Thread Pitch (coarse) | Head Diameter (dk - DIN 7985) | Head Height (k - DIN 7985) | Recess Depth (t - Min/Max) | Tensile Strength Classes |
|---|---|---|---|---|---|
| M3 | 0.50 mm | 5.60 mm | 2.40 mm | 1.05 - 1.40 mm | Class 4.8 / 8.8 / Stainless A2 |
| M4 | 0.70 mm | 7.50 mm | 3.10 mm | 1.40 - 1.80 mm | Class 4.8 / 8.8 / 10.9 / A2-70 |
| M5 | 0.80 mm | 9.20 mm | 3.80 mm | 1.80 - 2.30 mm | Class 8.8 / 10.9 / 12.9 / A4-80 |
| M6 | 1.00 mm | 11.00 mm | 4.60 mm | 2.20 - 2.80 mm | Class 8.8 / 10.9 / 12.9 / A4-80 |
| M8 | 1.25 mm | 14.50 mm | 6.00 mm | 3.20 - 3.80 mm | Class 8.8 / 10.9 / 12.9 / Structural |
A sample of our high-capacity components produced directly in Handan Ningyuan's ISO-certified production lines.
How our technical department customizes micro-structures and coating systems to match specific industrial engineering guidelines.
We source structural raw material coils exclusively from premium domestic mills. For standard construction projects, structural grade carbon steels are heat-treated to 8.8, 10.9, or 12.9 hardness. For high-corrosion installations such as offshore oil hubs and coastal PV fields, we employ advanced cold-workable Stainless Steel alloys (A2-70, A4-80, SUS316) that offer superior chloride resistance.
Specialty projects also leverage high-grade non-conductive Nylon flat washers and custom composite components designed for thermal insulation and structural isolation in smart electronic systems.
Integrated fastening packages tailored for modern high-load infrastructure, mechanical equipment, and electrical grids.
We supply complete PV structure packages including C-shaped steel, U-shaped steel, H-rails, press blocks, photovoltaic piles, and specialized hot-dip galvanized mounting bolts. These hold solar arrays rigidly against wind shear and heavy snow loads.
Our pipe gallery integrated systems, seismic support components, and wedge anchor expansion bolts secure critical building ventilation, gas pathways, and high-voltage wiring channels. These are built to meet rigorous mechanical safety standards and structural guidelines.
Whether configuring internal control relays or mounting electrical motor housings, our fillister head screws fit securely in counterbored holes. This creates a clean finish with minimal tool wear, reducing the overall footprint of structural metal components.
Field installations and structural systems incorporating our specialized fastener and steel support solutions.
Quality and precision are central to our operations. Every production run undergoes testing for dimensional accuracy, mechanical tensile strength, shear resistance, and plating thickness. Our testing lab features optical sorting machines, digital micro-hardness testers, and specialized salt spray chambers to verify corrosion performance.
Addressing the top technical questions from global procurement managers and structural engineering professionals.
Complete structural solutions, from heavy-duty expansion anchoring to specialized structural connectors.
Premium components manufactured to support solar mounts, machinery frames, and construction infrastructure.
Handan Ningyuan combines technical expertise, advanced manufacturing, and quality certifications to deliver high-performance fasteners. Whether you need custom fillister head dimensions or container-load structural brackets, our engineers are ready to support your project.
Submit your required sizes, material grades, or project drawings. Our technical team will review and respond with complete pricing and production timelines.
Specialized High-End Fasteners, Photovoltaic Racking Systems, & Seismic Bracing Solutions.