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 are innovative self-locking fasteners that combine the strength of carbon steel with the anti-vibration properties of a nylon insert. Designed to address loosening caused by vibration, torque, or environmental stress, these nuts integrate a built-in flange (acting as a washer) and a nylon collar that creates a tight frictional fit with bolt threads. Suitable for automotive, machinery, construction, and industrial applications, they deliver reliable locking performance while distributing load evenly and protecting bolt threads from liquids and chemicals. As a cost-effective, reusable solution, self-locking flange nuts are the go-to choice for projects requiring long-term stability in high-vibration environments.
| 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 nuts feature a hexagonal shape for easy tool engagement and an integrated flange at the base—eliminating the need for a separate washer. The key design element is the nylon insert, strategically placed within the nut’s threads to create resistance when mated with a bolt. The flange is smooth and wide, ensuring maximum contact with the secured surface to distribute pressure evenly.
Crafted from high-strength carbon steel (available in grades 4.8, 6.8, 8.8, 10.9, and 12.9), these nuts offer exceptional tensile strength and durability. Surface finish options include zinc-plated, nickel-plated, tin-plated, black oxide, passivated, and chrome-plated, each enhancing corrosion resistance and suitability for specific environments. For specialized applications, we also offer stainless steel (SS201, SS304, SS316), titanium, aluminum, and brass variants.
Available in sizes corresponding to their material grades (4.8, 6.8, 10.9, 12.9, etc.), these nuts comply with international standards including DIN6926, ISO, GB, JIS, ANSI, and ASME. Thread options are compatible with UNC, UNF, and metric threads, ensuring versatility across different bolt types and applications.
The nylon insert creates consistent friction against bolt threads, preventing the nut from loosening due to vibration, shocks, or thermal expansion—critical for automotive lock nuts and machinery fasteners. This self-locking feature eliminates the need for additional locking hardware like lock washers or thread locker.
The built-in flange increases the bearing surface area, distributing pressure evenly across the secured component to reduce damage and improve load-bearing capacity. This design also simplifies installation by removing the need for a separate washer, saving time and reducing costs.
Unlike one-time-use locking fasteners, nylon insert lock nuts are designed for repeated removal and reinstallation. The nylon insert deforms slightly to grip the bolt but retains its locking ability over multiple uses, making them a sustainable choice for maintenance and repair applications.
Compatible with standard wrenches and sockets, these nuts require no specialized equipment for installation. The locking action activates as soon as the nut is tightened onto the bolt, with a noticeable increase in resistance indicating the nylon insert is engaged—ensuring proper installation even for less experienced users.
The nylon insert provides a secondary benefit of sealing bolt threads against liquids (oil, water) and chemicals, preventing corrosion and extending the lifespan of both the nut and bolt. This feature is particularly valuable for outdoor or industrial applications exposed to harsh elements.
By combining locking, load distribution, and sealing capabilities in a single component, these nuts eliminate the need for additional hardware (washers, thread locker). Their reusability and durability further reduce long-term costs, making them a budget-friendly choice for large-scale projects.
All DIN6926 lock nuts are manufactured to strict DIN6926 specifications, with additional compliance to ISO, GB, JIS, ANSI, and ASME standards. This ensures compatibility with global bolt systems and consistent performance across applications.
Our production process is certified to ISO9001:2008, with SGS testing reports and RoHS compliance verifying the quality and safety of our products. Each batch undergoes rigorous testing for tensile strength, torque resistance, and corrosion resistance.
Carbon steel variants undergo specialized heat treatment processes—including tempering, hardening, spheroidizing, and stress relieving—to enhance strength and durability. This ensures the nuts can withstand high torque and vibration without deformation.
Nuts are supplied in general export packaging, with custom packaging options available to meet customer requirements. We offer a lead time of 7-15 days after order confirmation, with fast delivery for urgent orders to keep your projects on track.
Yes, DIN6926 nylon insert lock nuts are specifically engineered for vibration resistance. The nylon insert creates a tight frictional fit with bolt threads, preventing loosening even in high-vibration environments like automotive engines, industrial machinery, and construction equipment.
These nuts are compatible with a wide range of bolt types, including carbon steel, stainless steel, and titanium bolts, as long as the thread size (UNC, UNF, metric) matches. They adhere to international standards, ensuring compatibility with most industrial and automotive bolt systems.
Avoid overtightening, as excessive torque can damage the nylon insert, bolt threads, or the secured component. Tighten until you feel a noticeable increase in resistance—this indicates the nylon insert is fully engaged and the nut is securely locked. Use standard wrenches or sockets to prevent slipping and marring the nut’s surface.
Yes, the nylon insert acts as a barrier to seal bolt threads against water, oil, and other chemicals. While not fully waterproof, this sealing property significantly reduces corrosion and protects the fastener assembly in damp or chemical-exposed environments.
