U-Shaped Nail Fencing Staples
Stop fighting loose wires with staples that slip.
Engineered barbs that bite deep and never let go.
Factory-direct durability forged for the world’s harshest environments.
Sinsun: Professional OEM Galvanized & Barbed U Nails Manufacturer – Heavy Duty Fencing Solutions
Discover Sinsun’s high-quality U Nails for fencing and wood. Available in single barbed, double barbed, and galvanized finishes. Factory direct prices, custom sizes, and fast global shipping. Get a quote today!
Get a Quick QouteSinsun Factory Direct U Nails | Professional Fencing & Woodworking Solutions
The weakest staple on a fence makes it strong. When animals are around or the temperature rises, standard U-nails often come loose, which can be costly to fix and make things less safe. We have transformed the simple staple into a high-performance fastener at Sinsun.
Our U-shaped fencing nails are made from high-tensile wire, so they won't bend when you drive them into seasoned hardwood posts. Sinsun has the mechanical interlocking power your project needs, whether you need one barbed U-nail for standard mesh or our signature double-barbed design for high-strain boundary wires.The nails we send don't only ensure the longevity of your enclosure, but also provide peace of mind.
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Popular Product Categories
| Parameter | Specification Details | Notes / Options |
| Wire Gauge (AWG) | 9 Gauge, 10 Gauge, 11 Gauge, 12 Gauge, 14 Gauge, 16 Gauge | Custom gauges available upon request |
| Wire Diameter (mm) | 1.6 mm – 4.0 mm | ±0.05 mm tolerance |
| Leg Length (mm) | 15 mm – 100 mm | Standard: 25, 30, 40, 50, 65, 75 mm |
| Inside Crown Width (mm) | 12 mm – 50 mm | Standard: 25 mm, 28 mm, 32 mm, 38 mm |
| Outside Crown Width (mm) | Crown Width + (2 × Wire Diameter) | Varies by gauge |
| Point Type | Diamond Point / Chisel Point / Sharp Angle | Ensures easy penetration |
| Barb Type | Smooth (No Barbs) / Single Barbed / Double Barbed | Barb angle: 30°–45° |
| Barb Position | 3 mm – 8 mm from point | Prevents over-penetration |
| Surface Finish | Bright (Plain) / Electro-Galvanized / Hot-Dipped Galvanized | HDG: 40–60 g/m² zinc coating |
| Hardness (HRC) | 38–45 HRC (Heat Treated) | Optional for hard wood applications |
| Tensile Strength | 600 – 900 N/mm² | Varies by gauge and treatment |
| Packaging Type | Box / Carton / Pallet / Bulk Bags | Custom branding available |
| Quantity per Box | 1 kg / 5 kg / 10 kg / 25 kg / 50 lbs | Custom counts available |
| Box Dimensions | Varies by size | Printed with specs and barcode |
| Pallet Quantity | 40 – 60 boxes per pallet | Shrink-wrapped for shipping |
| MOQ (Stock Items) | 10 Boxes | Sample orders welcome |
| MOQ (Custom OEM) | 500,000 pieces | Negotiable for long-term partners |
| Lead Time | 7–15 days (Stock) / 25–35 days (OEM) | Depends on quantity and finish |
| Shipping Terms | FOB / CIF / CNF / EXW | Major ports: Shanghai, Ningbo, Shenzhen |
| Certifications | ISO 9001:2015 / SGS / BV | Available upon request |
| Size Code | Gauge (AWG) | Wire Dia (mm) | Leg Length (mm) | Crown Width (mm) | Barb Type Options | Finish Options | Application |
| SN-1425S | 14 | 2 | 25 | 25 | Smooth / Single | EG / HDG | Chicken wire, Light netting |
| SN-1230D | 12 | 2.6 | 30 | 28 | Single / Double | EG / HDG | Sheep fencing, Welded wire |
| SN-1240D | 12 | 2.6 | 40 | 28 | Single / Double | EG / HDG | General farm fencing |
| SN-1040D | 10 | 3.2 | 40 | 32 | Single / Double | HDG | Barbed wire, Medium tension |
| SN-1050D | 10 | 3.2 | 50 | 32 | Double | HDG | High-tensile wire, Cattle |
| SN-0950D | 9 | 3.7 | 50 | 38 | Double | HDG | Heavy security fencing |
| SN-0965D | 9 | 3.7 | 65 | 38 | Double | HDG | Horse fencing, Commercial |
| SN-0975D | 9 | 3.7 | 75 | 38 | Double | HDG | Extra heavy duty |
Sinsun U Nails – Application Guide
U Shaped Nails for Fencing
The connection between your wire and wooden posts is the weakest part of the fence when you need to keep animals in, define property lines, or keep predators out. Sinsun U Shaped Nails for Fencing are made to handle the constant stress, weather exposure, and animal pressure that break regular fasteners.
These heavy-duty staples go through woven wire, welded mesh, or high-tensile sheep fencing and grip wooden posts so tightly that they won't let go. The wide crown spreads the pressure evenly over the wire, which keeps the staple from cutting through the metal strands over time. We suggest our hot-dipped galvanized finish with double barbs for perimeter fencing. This combination makes a permanent bond between the post and wire that can handle freeze-thaw cycles and livestock rubbing. Sinsun gives you the holding power you need to keep your boundaries safe and your maintenance low, whether you're fencing ten acres or ten thousand.
U Shaped Nails for Wood
Not every U-nail application uses barbed wire and cows. You need a fastener that drives cleanly, holds securely, and looks professional for woodworking, landscaping, and building projects. That's exactly what ShinSun U-Shaped Nails for Wood do.
We make these staples with sharp, chiseled points that cut through wood fibers instead of crushing them. This lowers the risk of splitting by a lot, even when working close to the edges of the boards. The legs are smooth and even. This makes it easy to attach hardware cloth to wooden garden frames, hold landscape fabric in place under raised beds, or put weatherstripping around barn doors. Our smaller gauges for training wires on wooden trellises are especially popular with vineyard owners. The staples hold the vine support wires tightly, and the smooth finish keeps the canes from damage. With Sinsun, you can add a fastening solution to your wood structures that blends in with the project. This solution works hard behind the scenes.
U Nail for Wire
For electrical, data, or low-voltage systems, fasteners must hold the cable in place without crushing it or damaging its insulation. The Sinsun U-Nail for wire applications solves this problem with precisely made staples designed specifically for managing wires.
Crown height is the most significant measurement here. Our wire-specific U-nails have interior clearance that is just right to hold the wire tightly against the surface while leaving enough room to prevent damage from compression. Electricians use them to install Romex along basement beams. Low-voltage installers ensure speaker wire is safe along baseboards. Sign installers attach LED channel letters to wooden backings. A bright or electro-galvanized finish gives the surface a clean, professional appearance.Over time, plastic cable clips break and fail, but Sinsun metal staples keep wires in place permanently. Our U-nails are more reliable than cheap alternatives when running wire cleanly and keeping it running.
U Shaped Nails for Wall
When you attach things to walls, you often need strong fasteners that don't stick out too much. Conduits, cables, decorative items, and functional hardware can be attached to vertical wood surfaces with Sinsun U-shaped nails.
Our wall-specific line has short leg lengths that prevent blow-through on finished walls and paneling. The narrow crowns also keep materials flush against the surface for a clean, finished look. People use them to hang holiday lights along the wooden eaves without damaging the building. Workshops and outbuildings attach EMT conduit to wood frames. Theater crews run lighting cables along wooden battens. Our electro-galvanized finish gives the fastener a subtle, unobtrusive look that doesn't draw attention to it. This is great for applications where appearance matters. And since these are genuine Sinsun nails and not staples from the hardware store, you can trust they will always be of the same high quality.Straight legs and strong holding power are expected. Sinsun U-shaped nails for wall applications will hold anything you put on wood, from cables to conduit to decorations.
| Application | Recommended Sinsun Product | Key Feature | Best Finish |
| Fencing | Double Barbed U Nails | Maximum pull-out resistance | Hot-Dipped Galvanized |
| Wood Projects | Smooth / Single Barbed | Split-resistant points | Bright / Electro-Galvanized |
| Wire Management | Smooth, Precision Crown | Non-crush clearance | Electro-Galvanized |
| Wall Mounting | Short Leg / Narrow Crown | Flush finish, no blow-through | Electro-Galvanized |
Every Sinsun U nail is manufactured to the same exacting standards regardless of application. The difference is in the geometry, finish, and barb configuration—engineered specifically for how and where you will use it.
Customer Feedback
"As a woodworking factory, we need U nails that hold wooden boards firmly without splitting the wood." Sinsun's single barbed U nails are just right. They are sharp enough to cut through wood easily, but not so thick that they hurt it. We also use their U-shaped nails to build walls, and they fit our wall panels perfectly. The price is much better than from other suppliers, and the quality is always the same. "We've been working together for three years and will keep working."
"I sell U nails to local construction and fencing companies, and Sinsun's products are the best-sellers." Customers love their double-barbed U nails and galvanized U nails because they last a long time and don't slip. What I like best about them is that they have a flexible minimum order quantity and can customize orders. When I needed a certain size for a wire nail, they made the sample in three days and sent the bulk order on time. "They're a good partner for my business."
Frequently Asked Questions (FAQ)
What is the difference between U nails with one barb and U nails with two barbs? Which one should I pick?
A: Single barbed U nails are cheap and have basic anti-slip properties. They work well for light to medium-duty tasks, such as fixing walls and woodworking. Double-barbed U nails are better for holding things together in tough situations like outdoor fencing and securing wires. If you're not sure, send us a message along with the details of your use, and we'll suggest the right type for you.
Do you provide certification documents? Can your U nails meet my country’s export standards?
A: Yes, our U nails have passed CE, ISO 9001 and RoHS certifications. We can provide all relevant certification documents and test reports to ensure your goods pass customs smoothly. Our products meet the export standards of most countries, including Europe, North America, Australia and Southeast Asia. If your country has special requirements, we’ll do our best to meet them.
Can you use U nails outside? How long can they stay rust-free?
A: Yes, our hot-dip or cold-galvanized U nails are made for use outdoors. Cold galvanized U nails can last 2–3 years outside without rusting, while hot-dip zinc U nails can last 5–8 years. We also sell 304 stainless steel U nails for places with humidity or near the ocean, where they are less likely to rust.
Why choose Double Barbed over Smooth U nails?
A: Double barbs provide superior "pull-out" resistance. Once driven into the wood, the barbs lock against the grain, making them nearly impossible to remove without specialized tools—perfect for high-tension fences.
How does Sinsun guarantee the galvanization thickness?
A: Every batch undergoes a coating weight test. Our Hot-Dip Galvanized nails typically exceed 40-60g/m², ensuring decades of rust-free service even in coastal regions.
Can you provide bulk packaging for automated fencing machines?
A: Yes. We offer 5kg, 10kg, and 25kg bulk pails or cartons, palletized for international shipping and easy site distribution.
Can your U nails be used for different applications like fencing, wood, wire and wall?
A: Absolutely! Our U nails are versatile and tailored for various uses: u shaped nails for fencing (securing mesh, rails and posts), u shaped nails for wood (fixing boards, beams and furniture), u nail for wire (securing cables, mesh wires), and u shaped nails for wall (installing panels and decorative strips). We can also customize the size and type to fit your specific application.
What is the MOQ for your U nails? Do you offer discounts for bulk orders?
A: The MOQ for standard U nails (single/double barbed, galvanized, fencing staples) is 1000 pieces. For customized products, the MOQ can be negotiated. We offer attractive discounts for bulk orders—the larger the order quantity, the higher the discount. Send us an inquiry with your purchase volume and specifications, and we’ll provide you with the best quote.
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