A nylon insert flange nut, or Nyloc flange nut, is a type of fastener that combines a flange (a built-in washer) with a nylon collar. The nylon insert creates a tight, frictional fit against the bolt or screw threads, providing a self-locking feature that prevents the nut from loosening due to vibration or torque. The flange helps to distribute the load over a larger surface area, reducing damage to the secured part and increasing the nut's overall load-bearing capability.
DIN6926 carbon steel hexagon flange nylon insert lock nuts represent a critical advancement in secure fastening technology, engineered specifically to combat the relentless forces of extreme vibration, dynamic loads, and mechanical stress. The moment you handle these fasteners, the substantial weight of the forged carbon steel and the precise, smooth contour of the integrated flange convey immediate structural integrity. Inside the crown, the distinct, resilient nylon collar is visibly seated, ready to engage. When torqued onto a mating thread, this non-metallic insert deforms elastically—not destructively—creating a remarkably tight, custom-fit friction grip that firmly resists loosening. By incorporating a wide, flat or serrated flange base, these self-locking nuts eliminate the cumbersome need for separate washers, effectively spreading the clamping load across a broader surface area to prevent marring and material fatigue. Ideal for demanding automotive assemblies, heavy-duty construction machinery, and complex industrial frameworks, they provide an unyielding hold while simultaneously sealing out moisture, oils, and abrasive dust. Investing in these reusable, high-strength components ensures long-term operational stability and a streamlined assembly process for large-scale production runs.
| Product Name | Nylon Locking Hex Flange Nut Factory Supply DIN6926 Nylon Locking Hex Flange Nut |
| Material | Stainless Steel: SS201, SS303, SS304, SS316, SS410, SS420 Carbon Steel: 4.8, 6.8, 8.8, 10.9, 12.9 Titanium: GR1-GR5 Aluminum,Brass,etc. |
| Size | 4.8/ 8.8/ 10.9/ 12.9 Ect |
| Standard | ISO,GB, DIN, JIS, ANSI, BSW,ASME |
| Certificate | ISO9001:2008, SGS testing report & RoHS |
| Finishing | Zn- Plated, Ni-plated, Tin-Plated, Radiant Plated, Passivated, Brass plated, Cd- plated, Phosphate Anodize, Cr-plated, Black Oxide etc |
| Heat Treatment | Tempering,Hardening,Spheroidizing,Stress Relieving etc |
| Package | General export package, or according to customer's requirement |
| Delivery time | About 7 -15 days after all details confirmed and able to offering fast delivery for urgent order |
| Customer Service | Replacement at all our cost for rejected products if the part does not match with the PO drawings |
The tactile experience of these fasteners reveals a meticulously engineered two-part locking mechanism. The solid hexagonal body transitions smoothly into a broad, integrated flange. Procurement teams can specify either a standard flat-bottom flange for smooth surface protection or a specialized serrated flange texture. The serrated option features precisely machined radial teeth that physically bite into the mating material, aggressively multiplying the anti-rotation resistance in extreme-vibration environments. At the top of the nut, the embedded nylon ring feels firm yet pliable. As the bolt threads pass through, this insert compresses, eliminating all clearance between the thread flanks and establishing a continuous, 360-degree frictional interlock.
Crafted from rigorously tested carbon steel, these fasteners are available across multiple strength grades including 4.8, 6.8, 8.8, 10.9, and the ultra-high-tensile 12.9. The surface treatments are applied with exacting uniformity. A freshly zinc-plated or nickel-plated nut presents a bright, clean metallic sheen, while black oxide offers a distinct, matte dark finish ideal for low-reflectivity requirements. Additional options like tin-plating, chrome-plating, and passivation not only enhance the visual appeal but provide a critical barrier against atmospheric corrosion, chemical exposure, and galvanic degradation. We also supply stainless steel (SS201, SS304, SS316), lightweight titanium, and brass variants for specialized environmental demands.
Precision is paramount in mechanical assembly. These nuts are manufactured to exacting millimeter-level tolerances, strictly controlling thread pitch, across-flats dimensions, and per-100-piece weight consistency to guarantee flawless automated feeding and manual installation. Our production lines accommodate a comprehensive array of configurations:
The defining characteristic of the nylon insert lock nut is its unwavering resistance to dynamic loads. When subjected to continuous mechanical oscillation, thermal cycling, or sudden impact shocks, the nylon collar maintains a vice-like grip on the bolt threads. This intrinsic self-locking capability completely negates the requirement for secondary locking mechanisms, such as messy chemical thread lockers, split ring washers, or safety wire, drastically streamlining the assembly workflow.
The generously proportioned flange acts as a built-in, heavy-duty washer. By drastically expanding the bearing surface area, it effectively dissipates clamping forces over a wider footprint. This prevents the fastener from crushing or indenting softer mating materials like aluminum or composite panels. Consequently, structural integrity is preserved, and the overall load-bearing capacity of the joint is significantly enhanced without adding extra components.
Unlike prevailing torque nuts that rely on metal distortion or single-use adhesives, the elastic nature of the nylon insert allows for exceptional reusability. During maintenance teardowns or equipment repairs, the nut can be backed off and reinstalled multiple times. The polymer memory of the insert ensures it regains enough of its original shape to provide reliable locking torque upon reassembly, supporting sustainable maintenance practices and reducing consumable waste.
Despite their advanced locking capabilities, these fasteners require zero specialized installation equipment. They interface perfectly with standard pneumatic drivers, torque wrenches, and hand sockets. Operators will feel a distinct, smooth increase in rotational resistance the moment the bolt engages the nylon ring—a clear tactile indicator that the locking mechanism is actively functioning, ensuring foolproof installation on the assembly line.
Beyond mechanical retention, the compressed nylon collar performs a vital secondary function as an environmental seal. By filling the microscopic gaps between the male and female threads, it creates a formidable barrier against the ingress of water, lubricating oils, and corrosive industrial chemicals. This sealing action arrests internal thread rusting and galvanic corrosion, ensuring the joint can be disassembled cleanly even after years of harsh outdoor exposure.
Consolidating the nut, washer, and locking compound into a single, unified component dramatically reduces bill-of-materials (BOM) complexity and inventory management overhead. To further optimize supply chain economics, we offer highly transparent tiered pricing structures and specialized bulk pack configurations. As procurement volumes increase, the unit cost decreases proportionally, delivering substantial financial advantages for large-scale manufacturing operations and continuous production facilities.
Every fastener rolling off the production line is subjected to stringent dimensional and metallurgical audits to guarantee absolute adherence to DIN6926 specifications. This uncompromising commitment to international standards—including ISO, GB, JIS, ANSI, and ASME—ensures that our locking flange nuts will integrate flawlessly into existing global supply chains and complex engineering blueprints without compatibility issues.
Our manufacturing ecosystem operates under the strict protocols of ISO9001:2008 certification, prioritizing environmental responsibility and global market compliance. Every procurement order is backed by comprehensive documentation to ensure 100% compliance for high-end manufacturing and export projects:
Carbon steel variants are subjected to meticulously calibrated thermal processing. Through a sequence of tempering, hardening, spheroidizing, and stress-relieving cycles, the internal grain structure of the steel is optimized. This precise metallurgical control yields a fastener that possesses both the immense surface hardness required to resist deformation under high torque, and the core ductility needed to absorb sudden shear forces without catastrophic fracture.
We recognize that logistical reliability is just as critical as product quality. Finished nuts are secured in durable, export-grade packaging, with fully customizable bagging and labeling options available to match your specific warehousing requirements. Standard orders are fulfilled within a rapid 7-15 day window. Furthermore, we back our manufacturing excellence with a definitive long-term warranty (up to one year) and a highly responsive replacement protocol, effectively eliminating procurement risk from the source.
To accelerate your research and development phases, we provide complimentary, high-fidelity 3D CAD models of our entire standard fastener catalog. Our dedicated engineering support team is readily available to collaborate with your design professionals, offering technical guidance on torque specifications, material selection, and custom tooling requirements to ensure seamless integration into your proprietary assemblies.
Yes, they are purpose-built to conquer severe vibrational environments. The integrated nylon ring exerts a continuous, elastic radial pressure against the mating bolt threads, establishing a high-friction interference fit. This prevents the microscopic transverse movements that typically cause standard fasteners to back off. They are heavily utilized in engine mounts, heavy stamping machinery, and off-highway construction equipment where vibration is relentless.
These versatile nuts are designed to mate perfectly with a vast array of externally threaded hardware. Whether you are utilizing high-tensile carbon steel carriage bolts, corrosion-resistant stainless steel hex bolts, or specialized titanium machine screws, compatibility is guaranteed provided the thread pitch and diameter align. They are manufactured to universally recognized metric and imperial standards (UNC, UNF), ensuring drop-in replacement capabilities for existing assemblies.
Proper installation relies on controlled torque application rather than sheer force. It is crucial to avoid severe overtightening, which can strip the internal metal threads, crush the nylon insert, or permanently deform the mating flange. Operators should apply torque smoothly until a distinct, firm resistance is felt, signaling full engagement of the locking collar. Always utilize correctly sized, premium sockets or wrenches to prevent rounding off the hexagonal drive surfaces.
Absolutely. While not classified as a high-pressure hydraulic seal, the compressed nylon insert acts as a highly effective barrier against environmental ingress. As the bolt threads cut into the nylon, it fills the helical leak paths, blocking the migration of water, cutting fluids, and lubricating oils. This localized sealing significantly mitigates the risk of galvanic corrosion and rust formation within the threaded joint, prolonging the operational lifespan of the entire assembly.
