Precision-manufactured tri-fold, structural, and closed-end rivets optimized for thin metal sheets, composite plastics, and heavy-duty industrial assembly.
WUXI AIPLLE METAL PRODUCTS CO., LTD. is a recognized pioneer and global engineering supplier specializing in high-grade blind rivets, structural rivet nuts, and customized non-standard industrial fasteners. Our manufacturing ecosystem integrates automated cold-heading technology with uncompromising quality assurance to empower Tier-1 automotive integrators, solar array builders, and composite panel fabricators worldwide.
Operating under strict ISO 9001:2015 compliance, our zero-defect strategy eliminates dimensional variances, secures repeatable clamping torque, and safeguards procurement managers against costly field failures. Furthermore, our dedicated production lines for automotive-grade fasteners operate under the stringent IATF 16949:2016 quality management framework, ensuring unmatched structural stability and material traceability.
Driven by an elite R&D engineering group, AIPLLE delivers over 10 patent-pending annual fastener innovations. Our technical advancements directly address emerging structural challenges—such as multi-material joining, electrolytic corrosion mitigation, and high-vibration retention in electric vehicles and renewable energy installations.
Our professional multi-lingual after-sales engineering team responds instantaneously to custom drawing submissions, technical inquiries, and field test validation requirements.
100% Optical Sorting Inspection Before ShipmentWhy structural tri-fold (lantern/bulbous) rivets outperform standard open-end rivets in low-density, sensitive, and high-vibration joint assemblies.
During setting, the rivet body splits into three distinct folded legs on the blind side. This creates a massive 3-point anchor pattern (often exceeding 3x the original hole diameter), dispersing tensile stress across a broad surface area without cracking brittle substrates.
Featuring oversized head diameters (12mm, 14mm, 16mm, and custom sizes), the front-side flange prevents pull-through in soft materials such as aluminum sheet metal, fiberglass, plastics, wood, and composite panels, ensuring robust clamping force retention.
Our engineered mandrel head locks securely within the body after break-off. Combined with optional rubber neoprene washers, our tri-fold blind rivets provide weather-resistant, splash-proof joints ideal for outdoor HVAC, roofing, and marine transportation.
| Rivet Diameter (d) | Flange Diameter (dk) | Recommended Hole Size | Rivet Body Material | Mandrel Material | Shear Strength (N) | Tensile Strength (N) |
|---|---|---|---|---|---|---|
| 4.0 mm (5/32") | 12.0 mm / 14.0 mm | 4.1 mm – 4.3 mm | Aluminium Alloy 5052 / 5056 | Zinc Plated Carbon Steel | ~ 1,250 N | ~ 1,650 N |
| 4.8 mm (3/16") | 14.0 mm / 16.0 mm | 4.9 mm – 5.1 mm | Aluminium Alloy 5052 / 5056 | Zinc Plated / Stainless Steel | ~ 1,850 N | ~ 2,400 N |
| 6.4 mm (1/4") | 16.0 mm / 20.0 mm | 6.5 mm – 6.8 mm | Aluminium Alloy 5056 / 6063 | High-Tensile Carbon Steel | ~ 2,900 N | ~ 3,800 N |
China Aluminium Large Flange Tri-Fold Blind Rivets are critically designed to solve structural joining problems in single-side access environments.
Used extensively in EV battery housings, interior plastic trims, fiberglass RV bodies, and aluminum trailer side walls where high clamp force without sheet distortion is required.
Securing mounting clamps onto thin trapezoidal corrugated sheets. The large flange spreads wind-lift forces, while the tri-fold tail seals firmly against thermal expansion.
Joining thin sheet metal ducts, electrical cabinets, and plastic housing modules. Eliminates thread stripping issues common with traditional self-tapping screws.
From raw wire coil selection to high-speed optical sorting, our automated production ensures unyielding batch-to-batch consistency.
Sourcing premium-grade 5052/5056 aluminum wire and high-tensile carbon steel mandrels with certified mill test reports.
High-precision multi-station cold heading machines forge the rivet sleeve and form exact large flange geometry.
Specialized longitudinal slitting tools create three perfectly symmetrical slots in the rivet body to guarantee split integrity.
Automated assembly machines insert nail mandrels into rivet sleeves with precise pull-break groove positioning.
AI laser vision sorting machines inspect 100% of finished stock to detect burrs, dimension drift, or surface defects.
Weighed automated boxing, custom poly-bagging, barcode labeling, and heavy-duty palletization for ocean freight.
We operate an integrated fleet of cold-forming equipment, dynamic tensile test benches, salt-spray corrosion chambers, optical sorters, and automatic bagging machinery.
Tailored fastener engineering for international distributors, OEM assembly plants, and large-scale industrial buyers.
Direct factory pricing eliminates middleman markups. Our automated high-speed production guarantees competitive unit costs while protecting your assembly lines from downtime due to defective fasteners.
In addition to raw polished aluminum and clear anodizing, we offer custom RAL color-matched painted heads (white, black, red, yellow) for seamless architectural and automotive aesthetic integration.
Every shipment is accompanied by complete Quality Inspection Reports, material composition certificates, RoHS & REACH compliance documentation, and salt-spray test logs.
Explore our full spectrum of structural Monobolt, Hemlock, Multi-Grip, and specialized automotive expansion nuts.
Expert answers regarding design selection, installation parameters, material science, and bulk order logistics.
Unlike standard blind rivets that form a concentrated ball on the blind side, tri-fold rivets split into three large "lantern" legs. Combined with an oversized front-side flange (up to 16mm or 20mm), this design distributes clamping pressure across a broad area, preventing material cracking, deformation, or pull-through on soft metals, plastics, and composites.
We primarily utilize 5052 and 5056 aluminum alloys. Alloy 5052 provides superior corrosion resistance in salt-water and outdoor environments alongside excellent ductility. Alloy 5056 delivers higher shear and tensile yield strength for demanding structural joints, ensuring reliable long-term mechanical locking.
Tri-fold fasteners possess exceptional multi-grip adaptability. The expanding three-leg tail design accommodates oversized, misaligned, or oval-shaped punched holes without losing structural clamping integrity, making them ideal for field repairs and high-tolerance assembly lines.
WUXI AIPLLE operates under ISO 9001:2015 and IATF 16949:2016 quality management systems. Every manufacturing batch undergoes rigid dimensional checks, shear/tensile breaking point verification, surface plating thickness checks, and 100% optical sorting before dispatch.
Yes. We provide complete OEM/ODM customization. We can adjust flange diameter dimensions (e.g., 12mm, 14mm, 16mm, 20mm), sleeve lengths, mandrel materials (steel or stainless steel), and apply custom powder-coated RAL head colors (white, black, red, yellow) to meet exact design specifications.
AIPLLE METAL
