Explore Sinsun Hardware's internationally certified fastener portfolio, built to withstand critical shear and extraction forces.
Sinsun Hardware, established in 2006, is a premier manufacturer and global supplier of high-performance fasteners. As Northern China's largest producer of Self-Tapping Screws, we operate from a massive, vertically integrated 30,000 sqm production facility. Driven by German-imported engineering systems and precision Taiwanese machinery, Sinsun coordinates complex logistics networks, handling a yearly supply of over 8,500 shipping containers to regional epicenters across the Middle East, Southeast Asia, South America, and Russia.
Our operation integrates a state-of-the-art 12,000 sqm smart warehouse maintaining an 18,000+ pallet capacity. This automated hub enables rapid deployment of standard and customized inventory, backed by multi-language structural support cells to optimize communications for international corporate procurement divisions.
N19 through N22 series staples (ranging from 19mm to 22mm leg lengths, or 3/4″ to 7/8″ equivalents) represent the peak structural standard for industrial heavy-duty framing, crate reinforcement, and automated pallet manufacturing. These fasteners utilize a medium-crown architecture, commonly operating under 16-gauge (1.6mm thickness) carbon steel wire structures to deliver exceptional lateral shear capacity and optimal resistance to pull-out forces.
| Staple Model | Leg Length (Metric) | Leg Length (Imperial) | Wire Gauge | Crown Width | Typical Applications |
|---|---|---|---|---|---|
| N19 Staples | 19 mm | 3/4″ | 16 Gauge (1.60 mm) | 11.1 mm (7/16″) | Subflooring, sub-framing, heavy crate assembly, and furniture structural joints. |
| N20 Staples | 20 mm | 25/32″ | 16 Gauge (1.60 mm) | 11.1 mm (7/16″) | Timber truss assemblies, composite deck foundations, and light pallet assembly. |
| N21 Staples | 21 mm | 13/16″ | 16 Gauge (1.60 mm) | 11.1 mm (7/16″) | Medium-density fiberboard framing, structural sheathing, and container reinforcement. |
| N22 Staples | 22 mm | 7/8″ | 16 Gauge (1.60 mm) | 11.1 mm (7/16″) | Heavy-duty wooden pallet manufacturing, concrete formwork securing, roof decking. |
Manufactured using carbon steel drawn from Ansteel Group’s premier C1022A raw stocks. Wire undergoes spheroidizing annealing in gas-fired atmospheric furnaces to yield high-tensile properties (exceeding 1,000 MPa) and a core hardness of HRC 28-32. This prevents buckling or leg deformation during high-impact pneumatic driving.
Our N19-N22 staples feature a heat-activated polymer resin coating along the legs. Upon high-velocity substrate penetration, frictional heat liquifies the resin layer. Once cooled within seconds, the resin solidifies, creating a powerful chemical bond that increases the extraction value by up to 40% compared to uncoated alternatives.
To resist oxidative stress, staples are treated with advanced protective finishes. Options include standard Electro-Galvanized coating (8-12 μm zinc deposition layer), Hot-Dip Galvanized coating (exceeding 1000 hours salt-spray resistance), and structural-grade Stainless Steel (SS304/SS316) for marine and high-humidity applications.
Sinsun Hardware represents the integration of scale, efficiency, and engineering precision. Sourcing steel coils directly from state-owned foundries guarantees uniform metallurgy and zero impurities, resolving structural vulnerabilities at the molecular level before manufacturing begins.
We deploy German-engineered multi-station cold heading machinery operating alongside Taiwanese forming systems. This allows our lines to run at rates up to 1,200 parts per minute, ensuring dimensional tolerances are maintained within +/-0.02mm across massive production campaigns.
Unlike factories that outsource secondary treatment, Sinsun operates four continuous, atmosphere-controlled gas furnaces. This processing unit handles 20 tons of structural components daily, ensuring complete core carbon uniformity and preventing brittleness in high-shear scenarios.
Operating an ERP-driven digital warehouse with over 18,000 pallet locations, Sinsun monitors inventory in real time. We automate batch picking and container consolidation to manage high shipping volumes while keeping global lead times under 4 weeks.
Heavy-duty medium crown fasteners must perform reliably in demanding operational environments. Below is an overview of standard structural deployment settings for N19-N22 staples.
In high-speed assembly systems, fastener jams can stop production lines. Sinsun's N22 staples are engineered with precise collating bands (high-tensile adhesive or wire fusion) to resist tool vibrations. This ensures reliable feeding in automatic tooling systems from Bostitch, Senco, or Paslode.
For industrial packaging, shipping boxes must withstand rough transit conditions. Leg lengths from 19mm to 22mm provide deep penetration through thick sheathing into dimensional softwood frameworks, helping prevent joint failure during loading and transport.
N20 and N21 staples are widely used in structural wall sheathing and subfloor prep. The crown profile helps prevent head pull-through on OSB and plywood panels, while the galvanized layer provides reliable corrosion protection under flooring finishes.
We are a dedicated manufacturer focused on delivering quality, efficiency, and engineering collaboration to OEMs and distributors worldwide.
We assist our partners with technical planning, material selection, and cost-benefit analysis, backed by complimentary sample testing. Our team works with clients from design through volume production to meet complex performance standards.
Operating under strict quality control protocols, we document every phase of production. We test raw steel batches, inspect drawing tolerances, monitor heat treatment, and perform tensile, torque, and salt spray testing in our labs.
Using our ERP systems, we maintain dynamic inventory buffers for common standard sizes, helping us maintain an on-time shipping rate above 99% across global networks.
We accommodate custom configurations, including special leg dimensions, custom crown widths, unique coatings (such as Dacromet or zinc diffusion), and private-label packaging to support your local market needs.
From a regional manufacturer to a global supplier, follow our milestones of capacity growth and technology upgrades.
Sinsun Hardware founded, focusing on high-quality structural nails and basic screw manufacturing.
Established dedicated export channels, expanding shipping networks to South America and Europe.
Integrated precision German multi-station forming tools and automated Taiwanese threading equipment.
Reached a capacity of 36,000 tons annually, backed by four advanced continuous heat treatment systems.
At Sinsun, quality control is integrated into every step of production. Our facility uses automated optical sortation units and physical inspections to maintain consistent standards across production batches.
Our quality assurance testing includes:
High-volume stapling is evolving with changes in materials, coatings, and tool integration. Here are three key trends affecting industrial packaging and framing applications:
Traditional collating adhesives can leave plastic residue in tooling systems. New biodegradable polymer binders dissolve cleanly during mechanical shearing without releasing harmful VOCs under high tool heat.
Using advanced steel alloys allows manufacturers to reduce wire gauge without sacrificing holding power. This lowers package shipping weight while maintaining structural safety margins.
Modern assembly lines use robotic pneumatic modules that require close fastener tolerances. Sinsun works closely with tool developers to ensure our collated staples feed smoothly in automated production environments.
Technical guidance, manufacturing details, and order options for global procurement partners.
Get in touch with our technical sales team for comprehensive drawings, material data sheets, and custom bulk pricing models within 48 hours.
Request Free N19-N22 Product SamplesExplore our extended catalog, manufactured to the same tolerances and standards as our core products.
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