Ningyuan Fastener
Ningyuan Fastener
In the evolving landscape of global industrial construction and assembly, the Double Threaded Screw (often referred to as a hanger bolt or dowel screw) has transitioned from a niche hardware component to a critical structural element. Handan Ningyuan Fastener Manufacturing Co., Ltd., leveraging over 18 years of specialized engineering, presents this comprehensive white paper on the mechanical applications, material innovations, and global procurement trends of high-quality double threaded solutions.
As a leading Double Threaded Screws Factory, we recognize that the dual-end configuration—typically featuring a wood thread on one side and a machine thread on the other—is fundamental in modern "Blind Fastening" and hybrid material joining. From solar panel mounting systems to seismic-resistant architectural facades, our products ensure longitudinal stability and shear resistance that single-thread fasteners simply cannot match.
Transitioning from standard carbon steel to high-tensile alloys (8.8, 10.9, 12.9 grades) and anti-corrosive stainless steels (A2/A4) for offshore and chemical environments.
Implementation of Hot-Dip Galvanizing, Dacromet, and Geomet coatings to ensure 1000+ hours of salt spray resistance for solar bracket systems.
Moving toward fully automated cold heading and thread rolling processes that guarantee dimensional tolerances within microns.
Handan Ningyuan Fastener Manufacturing Co., Ltd. (formerly Jin Langtao), founded in 2005, is located in Handan Yongnian, the fastener capital well-known at home and abroad. Since its inception, the company has adhered to the enterprise philosophy that development is the direction and hard work is the truth.
Through 18 years of continuous efforts to innovation and development has become a well-known modern enterprise in the industry. We operate with a strong team encompassing R&D, production, and sales, providing system solutions for photovoltaic new energy, building electromechanical seismic systems, and pipe gallery integrated support.
Global demand for Double Threaded Screws is currently driven by the rapid expansion of the renewable energy sector in Europe and the modular housing boom in North America. Procurement officers are no longer just looking for the lowest price; they are seeking "Supply Chain Resilience" and "Verification of Compliance."
Photovoltaic bracket, C-shaped steel, U-shaped steel, H rail, seismic support, and pipe gallery support systems.
Hot-dip galvanized hex bolts, nuts, triangle bases, embedded plates, and U-shaped wire.
Drill tail wire, dry wall nails, truss head self-drilling screws, and custom double-threaded bolts.
Our double threaded hanger bolts are optimized for rooftop solar installations, allowing a water-tight seal in wooden rafters while providing a rigid machine thread for L-foot attachments. This reduces installation time by 30%.
In high-seismic zones, the anchoring must withstand lateral shifts. Our high-strength expansion bolts and double-threaded rods are engineered to absorb kinetic energy, protecting critical HVAC and piping galleries.
We provide the precision required for high-end wood-to-metal joining, ensuring that Ready-to-Assemble (RTA) furniture maintains its structural integrity through multiple assembly cycles.
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, and strict standards, we provide each partner with the best quality products.
