The N50 (50mm / 2″) staple is a heavy-duty industrial fastener primarily manufactured from 16-gauge steel wire. Recognized globally for its structural holding power, this size serves as the engineering benchmark for subflooring, roof sheathing, timber framing, and high-strength wooden pallet construction. The combination of a wide crown (typically 10.8mm to 11.1mm / 7/16″) and a 50mm length offers a significantly higher shear capacity and pull-through resistance than standard brads or thin-gauge nails.
Internationally, B2B procurement operations choose the N50 profile to fulfill strict structural load-bearing parameters outlined by building regulations like the US International Residential Code (IRC) and Eurocode 5. In logistics, N50 staples prevent dynamic shifting in wooden shipping containers and industrial pallets, offering seismic and vibrational resistance during trans-oceanic shipping.
For engineering applications, specifying the exact dimensions and tolerances is critical. The structural performance of our ODM N50 staples is monitored under strict ISO guidelines:
| Parameter | Standard Specification | Tolerance Limit |
|---|---|---|
| Wire Diameter | 1.60 mm (16 Gauge) | ±0.02 mm |
| Leg Length | 50 mm (2 inches) | ±0.50 mm |
| Crown Width | 11.1 mm (7/16 inch) | ±0.15 mm |
| Tensile Strength | 900 - 1100 MPa | Certified Quality |
| Corrosion Protection | Hot-Dip Galv. / SS304 | Salt Spray 500h+ |
Sinsun Hardware, established in 2006, is a leading manufacturer and global supplier of high-quality fasteners. As Northern China's largest producer of Self-Tapping Screws and industrial staples, we operate from a massive 30,000 sqm integrated facility that includes modern production zones, a 12,000 sqm smart warehouse (18,000+ pallet capacity), and multi-language customer support centers. Our yearly supply of over 8,500 containers consistently services key global markets such as the Middle East, Southeast Asia, South America, and Russia.
Our production prowess is driven by German-imported machinery, precision Taiwanese technology, and a dependable staff of trained specialists. We offer over 20,000 SKUs of nails, screws, wires, and rivets, each undergoing 12+ stringent quality checks to assure outstanding polish (Ra ≤ 0.4μm), corrosion resistance (1,000+ hours salt spray), dimensional accuracy (±0.02mm), high strength (1,000+ MPa), and consistent hardness (HRC 28-32).
Get a Quick QuoteFrom Sinsun's founding in 2006, we have grown into a leading Chinese fastener manufacturer. Explore our journey of expansion, raw material integration, technology upgrades, and capacity scale-up.
Sinsun began with a singular focus: to build a factory dedicated to self-tapping screws. This foundational specialization established our core expertise and high standards for carbon steel drawing and forming.
The year 2012 marked a pivotal step for Sinsun with the establishment of our Export Department. Our specialized fasteners and heavy-duty staples began reaching global construction and logistics markets.
We expanded control over our supply chain by adding four spheroidizing furnaces for raw material processing and in-house wire drawing capabilities, ensuring steel wire consistency from the raw stage.
Our production was enhanced with German multi-station cold heading machinery. Concurrently, we expanded our product lines to include drill tail screws, heavy staples, and specialized construction fasteners.
Sinsun's growth reached a landmark 36,000 tons in annual production, fulfilling international B2B orders with over 1,100 export containers shipped globally.
To support distribution and prevent logistics delays, we established a 1,200 sqm ready-stock facility, allowing for short-notice shipments of highly requested fasteners.
The addition of four advanced heat treatment lines significantly boosts our capacity. This translates to absolute consistency in product hardness and stronger guarantees for structural load-bearing projects.
At SINSUN, our quality control begins at the source. We start with premium raw materials from Xingtai Steel, then perform in-house spheroidizing annealing and precision wire drawing in our own plant. This ensures a uniform metal microstructure, high tensile consistency, and optimal performance under cyclic stresses.
We combine German-engineered multi-station cold heading machines with precision Taiwanese production technology. Our processes ensure every staple and screw is manufactured with maximum structural integrity, minimizing collation breakage and guaranteeing compatibility with all major pneumatic staplers.
SINSUN operates four dedicated heat treatment lines, allowing for precise processing times to achieve consistent carbon tempering. This advanced thermal processing ensures uniform tensile strength (1,000+ MPa) and core hardness (HRC 28-32), enabling N50 staples to penetrate hard substrates without bending.
Providing information gain for industrial procurement officers, this section outlines where and why N50 (50mm / 2″) staples are critical to global operations.
In the United States and Canada, structural building codes regulate roof sheathing and wall panels. Sinsun's N50 staples are engineered to provide maximum withdrawal resistance. The 50mm leg length ensures adequate penetration through structural panels (OSB or plywood) into wood studs, resisting lateral shear forces caused by wind loads or seismic events.
For logistics companies operating under European pallet standards (EPAL) and ISPM 15 compliance, Sinsun's 16-gauge N50 staples provide heavy-duty joints. The high collation strength ensures seamless performance in pneumatic automated framing systems, preventing jamming during high-volume production.
For agricultural applications, including wooden crates exposed to high moisture and fertilizer salts, our galvanized and stainless steel N50 variants offer rust resistance. Tested for over 1000+ hours in salt spray chambers, these staples maintain their structural integrity throughout long storage cycles.
As modular construction and smart pre-fabrication plants grow globally, automated stapling systems have become the standard. High-speed industrial stapling machines require consumables with strict dimensional tolerances (±0.02mm) and premium glue collation. Sinsun's N50 staples are manufactured specifically to prevent premature ribbon breakage, ensuring uninterrupted automated assembly lines.
Modern B2B procurement strategies prioritize ESG compliance. Sinsun's manufacturing facility has optimized its carbon footprint through thermal heat recapture in our 2025 heat treatment lines. By reducing energy waste and sourcing steel wire from ecologically compliant domestic mills, we ensure our global partners meet their carbon reduction targets.
The demand for weather-resistant fasteners has led Sinsun to develop advanced zinc-aluminum coatings and polymer-based topcoats. These developments extend the service life of our fasteners, ensuring they meet the durability requirements of modern outdoor wooden structures and long-term agricultural containment systems.
Every month, we welcome clients from across the world for on-site factory visits, demonstrating our production capacity and quality control systems. Sinsun Hardware actively participates in global exhibitions, showcasing fastener innovations and building lasting trade relationships.
