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Explore our top-performing threaded inserts designed specifically to eliminate spin-out in thin sheet metals.
In modern manufacturing, the drive toward lightweighting, structural optimization, and material efficiency has made thin sheet metal the material of choice across multiple key industries. From automotive body panels and aerospace skins to telecommunication enclosures and HVAC systems, thin sheet metals (typically below 3mm in thickness) provide high strength-to-weight ratios. However, joining these thin substrates securely presents significant engineering challenges. Traditional fastening techniques such as direct tapping are impossible due to the lack of material thickness required to form sufficient thread engagement. Welding often results in thermal distortion, burn-through, and destruction of pre-coated surfaces (such as galvanized or painted sheets), while demanding highly skilled labor and post-processing finishing steps.
SEO Insight: The integration of hex rivet nuts (also known as hexagonal blind threaded inserts) has emerged as the definitive solution to the thin-sheet joining dilemma. By providing robust, reusable load-bearing threads in sheets too thin to tap, hex rivet nuts streamline assembly lines and ensure maximum mechanical integrity.
While round knurled rivet nuts are widely used, they are susceptible to a failure mode known as "spin-out" or "rotation in the hole" when subjected to high dynamic loads or high-torque installation forces. Once a round insert spins, the joint fails, and repairs can be extremely costly. The Hex Rivet Nut addresses this vulnerability directly. By utilizing a hexagonal body installed into a matching hexagonal punched hole, the flat sides of the hex design provide a positive mechanical lock against the parent material. This geometry increases the torque-to-turn resistance by up to 200% compared to standard round knurled inserts. This makes hex rivet nuts indispensable in safety-critical applications where pneumatic or electric torque tools are used for rapid assembly.
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 customs effortlessly.
With IATF16949-2016 quality management system for automotive fastener production, We provide more stable and guaranteed product.
Powered by experienced R&D engineers group, we delivery 10 annual innovations to solve market demand and challenge newmarket, enhance your market working efficiency and competitiveness.
Our professional after-sales teams respond instantly. Keep your business smoothly and efficient.
WUXI AIPLLE METAL PRODUCTS CO., LTD.
We have advanced equipment, skilled technology and engineer team. COLD FORMING MACHINE, TESTING MACHINE ASSEMBLING MACHINE, POLISHING MACHINE, PACKING MACHINE. TESTING EQUIPMENT
When selecting a hex rivet nut for joining thin sheet metals, engineers must consider several critical parameters to ensure joint reliability. The primary factors include the thread size (ranging from M3 to M12 for standard applications), material composition, grip range, and head style. WUXI AIPLLE offers hex rivet nuts in various materials including carbon steel (zinc-plated for corrosion resistance), stainless steel (Grade 304 and 316 for harsh environments), and high-performance nickel alloys for extreme-duty applications. The grip range refers to the total thickness of the sheets being joined; selecting the correct grip range ensures that the rivet nut forms a complete, secure bulb on the blind side of the workpiece without over-stressing the installation tool or under-forming the insert.
The installation of a hex rivet nut is a straightforward yet highly precise process. It involves threading the insert onto the mandrel of an installation tool (manual, pneumatic, or cordless electric), inserting the assembly into the pre-punched hex hole, and activating the tool. The tool pulls the mandrel back, collapsing the unthreaded shank of the rivet nut outward. This creates a secure "bulb" or flange on the blind side of the sheet metal, clamping the parent material tightly between the tool-side head and the newly formed blind-side flange. Once the mandrel reverses out, a clean, high-strength internal thread is left behind, ready to receive a standard bolt or screw.
Design Advantage: Because the installation process is entirely mechanical and requires no heat, it preserves the integrity of pre-treated or pre-painted sheet metals. This makes hex rivet nuts highly compatible with modern automated assembly lines where cycle times are measured in seconds.
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, Non-standard rivets for automotive and so on.
The versatility of hex rivet nuts has led to their adoption across a vast array of high-stakes industrial applications. Let us examine how different sectors leverage these fasteners to achieve superior structural integrity and manufacturing efficiency:
The automotive industry is undergoing a massive shift towards lightweight materials such as aluminum alloys and composites to improve fuel efficiency and extend the range of electric vehicles. Standard welding processes are often incompatible with these materials. Hex rivet nuts provide a reliable, high-torque joining method for mounting battery packs, chassis brackets, interior trims, and structural reinforcements. With WUXI AIPLLE's IATF16949-2016 certification, our fasteners meet the stringent quality and safety standards required by global automotive OEMs, ensuring zero-defect performance under high-vibration driving conditions.
Heating, ventilation, and air conditioning (HVAC) units, as well as industrial electrical cabinets, are constructed primarily from thin sheet steel. These systems are constantly subjected to operational vibrations from motors, compressors, and fans. Traditional sheet metal screws can easily back out over time due to vibration, leading to structural loosening and electrical hazards. Hex rivet nuts provide deep, permanent machine threads that remain secure indefinitely, allowing panels to be removed and reattached during maintenance without stripping the threads.
In aerospace and telecommunications, weight savings and spatial constraints are paramount. Thin-gauge aluminum and composite panels are commonly used to construct server racks, antenna mounts, and aircraft interior components. Hex rivet nuts allow designers to place strong threads exactly where they are needed, even in closed box sections or blind areas where access to the backside is impossible. The high torque-to-turn resistance ensures that these fasteners can withstand the high installation forces associated with aerospace-grade hardware.
Joining thin sheets of metal, plastic, wood, or composite materials—especially in scenarios where only one side of the workpiece is accessible. Metal fabrication, automotive assembly, aerospace equipment, electronics, and construction.
Product Development - 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 expansion nuts.
Customer Development - 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 e-commerce platforms such as Amazon and AliExpress—significantly broadening our product reach and user base.
The global industrial fastener market is experiencing a significant shift toward smart manufacturing, automation, and environmental sustainability. For manufacturers like WUXI AIPLLE, staying ahead of these trends requires continuous investment in research and development and strict adherence to international quality management systems. Our compliance with ISO9001 and the automotive-specific IATF16949-2016 certification is a testament to our commitment to precision engineering. These standards govern every phase of our production, from raw material inspection and cold forming to optical sorting and final packaging, ensuring that every batch of hex rivet nuts we deliver is defect-free.
Modern environmental regulations, such as RoHS and REACH, have mandated the elimination of hazardous chemicals in manufacturing. In response, WUXI AIPLLE has adopted eco-friendly surface treatment technologies. Our hex rivet nuts are available with trivalent zinc plating and advanced nickel-zinc coatings, which provide exceptional salt spray resistance without compromising environmental safety. This makes our fasteners ideal for outdoor applications such as solar panel racking, telecommunication towers, and marine electronics, where long-term protection against atmospheric corrosion is critical.
To achieve the best performance when using hex rivet nuts, designers should adhere to several best practices. First, the hole size must be precisely matched to the flat-to-flat dimensions of the hex rivet nut body; oversized holes will reduce torque resistance, while undersized holes will prevent correct insertion. Second, the sheet metal material should ideally be softer than the rivet nut material to allow the insert to bite into the sheet during installation, enhancing the anti-rotation effect. Finally, selecting the correct tooling—such as pull-to-pressure or pull-to-stroke setting systems—ensures consistent installation quality and prevents damage to the threads of both the insert and the mandrel.
Browse our complete range of high-performance threaded inserts, manufactured to meet global industrial and automotive standards.
