Explore our core engineering-grade structural blind rivets manufactured to strict global standards for superior mechanical integrity.
An in-depth technical analysis on load distribution, shear resistance, and structural mechanics for global industrial procurement managers.
Unlike conventional open-end blind rivets that form a single expansion tail, Double Bulb Rivets (frequently categorized under high-strength multi-grip and structural blind fasteners) utilize a dual-upset axial compression mechanism. When setting tool traction force is applied to the mandrel, the metal sleeve collapses sequentially at two distinct stress points.
This dual-folding action creates a large bearing footprint on the blind side, distributing clamping forces across a significantly wider surface area. This capability makes double bulb fasteners the primary engineered choice for thin gauge sheet metal, brittle plastics, dynamic composite materials, and multi-layered joints where tail pull-through or parent material distortion must be prevented.
In high-vibration operational environments—such as heavy transit vehicles, agricultural machinery, and commercial HVAC equipment—standard fasteners suffer from localized fatigue failure. Double Bulb structural rivets solve this structural vulnerability through positive mechanical mandrel retention.
ISO 9001 and IATF 16949 Certified Manufacturer specializing in structural blind rivets, non-standard custom fasteners, and industrial cold-heading solutions.
WUXI AIPLLE is specialized in blind rivet, rivet nut and No-standard fastener for many years. Our ISO9001-Compliant quality control eliminates defects, ensures consistent performance, and protects you from costly returns. So you can build trust with your customers effortlessly.
With our IATF16949-2016 quality management system dedicated to automotive fastener production, we provide highly stable, fully traceable, and guaranteed engineering products for critical structural assemblies.
Powered by an experienced R&D engineers group, we deliver 10 annual innovations to solve evolving market demand, challenge new market technical barriers, enhance your assembly efficiency, and strengthen your global market competitiveness.
Our professional after-sales teams respond instantly to technical queries, offering comprehensive application engineering support to keep your automated business running smoothly and efficiently.
We boast a global customer base of over 200 overseas clients across more than 50 countries. By consistently investing in both online and offline customer acquisition efforts, we have successfully established our presence on major international platforms, broadening our product reach and global supply network.
Building on our proven track record of consistent product quality, we continuously expand our product portfolio to include custom non-standard parts, solid rivets, nickel-zinc plated automotive nuts, and high-expansion structural fasteners.
Equipped with high-precision cold forming machinery, automated sorting, and rigorous laboratory testing equipment.
High-purity raw materials including polished aluminum alloys (5052, 5056), zinc-plated carbon steel, and 304/316 grade stainless steel wire rods inspected for tensile consistency prior to cold forging.
Multi-station cold heading machinery shapes the double bulb body and pulls the mandrel head geometry with sub-millimeter accuracy, guaranteeing tight tolerances for high-speed automated installation.
High-efficiency automated optical insertion machines combine the formed rivet body with the grooved mandrel stem, ensuring perfect axial alignment and precise break-point placement.
Self-inspection during production matching export and automotive standards, including optical sorting machines, shear testing, tensile force pulling, and salt-spray corrosion chamber evaluations.
Warehouse sorting and stacking of standardized export cartons. Post-weighing automatic counter ensures exact box quantities, sealed tightly for international sea and air shipping logistics.
COLD FORMING MACHINE, TESTING MACHINE, ASSEMBLING MACHINE, POLISHING MACHINE, AUTOMATIC PACKING MACHINE, OPTICAL SORTING TESTING EQUIPMENT.
Providing critical structural fastening across single-sided access assemblies in automotive, solar, construction, and electronics sectors.
Fixing structural chassis brackets, door hinges, battery enclosures, and interior paneling. Double bulb rivets absorb road vibration while joining aluminum body panels to carbon steel sub-frames without thermal distortion.
Securing mounting rails, photovoltaic module framing, and tracking mechanisms. The high weatherproofing and anti-corrosive properties of our coated structural rivets guarantee long-term operational stability in harsh desert and coastal environments.
Assembling commercial air handling unit (AHU) cabinets, ductwork, electrical enclosures, and sheet metal frame assemblies. Provides leak-tight, dustproof structural joints that prevent acoustic resonance and dynamic rattling.
Compare mechanical properties to determine the ideal blind fastener for your specific assembly requirements.
| Rivet Type / Feature | Double Bulb / Multi-Grip | Standard Open End | Tri-Fold / Lantern Rivet | Monobolt Structural |
|---|---|---|---|---|
| Blind Side Footprint | Dual-Upset Wide Bearing | Single Small Bulb | Three Folded Wings | High-Clamp Swaged Tail |
| Grip Range Versatility | Very Wide (Multi-Grip) | Narrow (Fixed Thickness) | Wide (Soft Materials) | Medium to Wide |
| Vibration Immunity | High (Mechanically Locked Stem) | Moderate | Moderate | Extremely High |
| Shear & Tensile Rating | High Engineering Grade | Standard Commercial | Low-Medium (Plastic/Wood) | Heavy-Duty Industrial |
| Hole Fill Capacity | Superior Radial Expansion | Standard Expansion | Limited Radial Fill | Full Hole Expansion |
| Weatherproofing | High (Sealed Mandrel Core) | Low (Open Stem Core) | Requires Rubber Gasket | Hermetic Water-Tight |
Products include open end blind rivet series, grip blind rivet series, hemlock blind rivet series, trifold blind rivet series, rivet inserts series, high strength rivet, and Non-standard rivets for automotive applications.
Fast, reliable blind riveting for thin panels in aluminum, steel, and stainless steel specifications.
Designed for variable sheet thickness applications, reducing inventory and assembly tooling friction.
Structural blind fasteners with exceptional shear strength and internal stem locking mechanism.
Lantern rivets that split into three expanding legs for low-density composites, plastic, and soft wood.
Full hex, open end, and countersunk knurled body threaded inserts providing high torque resistance.
Custom engineered cold-formed components manufactured strictly under IATF 16949 quality guidelines.
We supply color-painted aluminum and stainless steel structural rivets matching RAL color codes for architectural aesthetics and OEM branding requirements (Including White, Red, Black, Yellow, and anodized polished finishes).
Expert technical answers regarding sourcing, mechanical properties, and installation specifications for wholesale double bulb rivets.
Double bulb rivets feature a multi-grip body that collapses axially into two distinct bulb formations on the blind side. This creates a broader surface footprint that distributes clamping force evenly, preventing damage to thin sheet metals, brittle composites, or soft plastics, while providing exceptional vibration resistance and wide grip-range flexibility.
WUXI AIPLLE operates under both ISO 9001 and IATF 16949-2016 Quality Management Systems. Our production lines utilize automated optical inspection and rigorous mechanical testing to eliminate defects, ensure full heat-number traceability, and satisfy stringent global automotive and industrial procurement benchmarks.
Yes. Powered by an experienced engineering R&D team delivering 10 annual innovations, we specialize in OEM/ODM non-standard rivets, custom mandrels, specialized head dimensions (dome, countersunk, large flange), and custom surface platings (zinc-nickel, anodized color coatings, oxide finishes).
During setting, the sleeve expands radially to completely fill slightly oversized or misaligned clearance holes. Combined with the internal stem-locking feature, the rivet body forms an airtight and splash-proof barrier against water, dust, and corrosive vapor exposure.
Double bulb fasteners can be installed using standard hydro-pneumatic, cordless electric, or heavy-duty manual blind riveting tools fitted with standard pulling nosepieces matching the rivet diameter (e.g., 3.2mm, 4.0mm, 4.8mm, 6.4mm / 1/8", 5/32", 3/16", 1/4").
Explore more specialized blind rivets and expansion nut series direct from China manufacturing facilities.
AIPLLE METAL