Stainless Steel DIN985 Hex Nylon Insert Nut Locking Nut ANSI ASME UNC Insert Nut Locking Nut with Serration

This product is a 304 stainless steel nylon anti-loosening nut (also known as nylon locking nut, self-locking nut, anti-loosening cap). It is a high-performance fastener specially designed for high-vibration, high-load, and long-term stable connection scenarios. The product is made of national standard 304 austenitic stainless steel as the base material, and is formed through precise cold heading, tapping, and passivation anti-rust processes. An elastic nylon locking ring is embedded inside. After tightening, the nylon ring tightly presses against the screw thread, forming a permanent anti-loosening effect. This effectively solves the industry pain point of traditional nuts being prone to loosening and falling off in vibration environments. It is widely applicable to the fastening needs in the automotive, mechanical, engineering, and home decoration industries, providing stable, long-lasting, and safe anti-loosening fastening solutions for various connections.

High-quality 304 stainless steel substrate, with full protection against rust and corrosion

Crafted with national standard 304 stainless steel (06Cr19Ni10), with compliant nickel-chromium content, non-magnetic, non-toxic and harmless, featuring excellent resistance to acid and alkali, corrosion and rust, capable of long-term use in humid, outdoor, coastal, chemical and other complex environments, without rusting or oxidizing, fully meeting food-grade and medical-grade usage standards, with a service life far exceeding carbon steel anti-loosening nuts.

Embedded nylon locking ring, with full anti-loosening performance

The nut is embedded with high elasticity nylon (PA66) locking ring. After tightening, the nylon ring is compressed and deformed, forming an interference fit with the screw thread, generating continuous clamping force. Even under high-frequency vibration and impact loads, it will not loosen. The anti-loosening effect is long-lasting and stable, allowing for repeated disassembly and use, without loss of anti-loosening performance.

Standard hexagonal structure, convenient for installation and universal

Strictly following international and domestic standards such as GB/T 889.1, ISO 7040, DIN 985, etc., the standard hexagonal shape is suitable for universal wrenches and electric tools, no special installation tools are required, it can be directly replaced with ordinary nuts of the same specification, installation is convenient, suitable for automated batch assembly and manual installation.

High-precision process, full of details

Using fully automatic cold heading + tapping process, the thread accuracy reaches 6H grade, the tooth shape is full, without burrs, no slippage, tight engagement, uniform force; the nylon ring is firmly embedded, without detachment or displacement, the surface is treated with passivation + mirror polishing, high glossiness, no scratches, the appearance is bright, and at the same time, the anti-corrosion ability is enhanced.

Full coverage of all specifications, suitable for multiple scenarios

Covering the full range of M2-M20 thread specifications, and also supporting non-standard customization, it can meet the full-scenario anti-loosening fastening needs from small precision instruments to large industrial equipment.

Anti-loosening and shock-resistant, absolutely safe connection: The nylon locking structure fundamentally solves the problem of vibration loosening. It is suitable for high-vibration and high-impact scenarios, ensuring long-term stability of the connection and completely eliminating the safety hazards caused by the detachment of the nuts.

Durable and long-lasting: The 304 stainless steel material inherently possesses excellent anti-corrosion properties. It can be used for a long time in outdoor, humid, and high-salt spray environments without rusting. There is no need for frequent replacement, and the maintenance cost is extremely low. The long-term use offers a much higher cost-effectiveness compared to carbon steel nuts.

Easy installation, universal compatibility: Standard hexagonal structure, compatible with common tools, can directly replace ordinary nuts, without changing the original assembly process. High installation efficiency, suitable for all industry scenarios.

Reassembling and disassembling is possible, with no loss of anti-loosening effect: The nylon ring maintains elasticity permanently. After repeated disassembly and reassembly, the anti-loosening performance does not diminish. It can be reused and is suitable for equipment scenarios that require regular maintenance and disassembly.

Full-process quality control, reliable quality: From the spectral inspection of raw materials upon entry to the size inspection during the production process, to the anti-loosening test, salt spray test, and mechanical performance test at the time of product delivery, the entire process adheres to the ISO 9001 quality management system. Each batch of products has consistent performance and is traceable. Purchasing is assured and usage is worry-free.

Q1: Can the nylon insert be damaged during installation?

A: When installed correctly using the appropriate tools and torque specifications, the nylon insert should not be damaged. However, over-tightening or using improper tools may cause damage to the insert, reducing its effectiveness.

Q2: Are these nuts suitable for high-temperature applications?

A: Our nylon lock nuts are designed for a specific temperature range. While they can withstand moderate heat, continuous exposure to extremely high temperatures may affect the performance of the nylon insert. It is recommended to check the product specifications for the maximum temperature limit applicable to your application.

Q3: Do you offer custom thread sizes?

A: Yes, we understand that some applications may require custom thread sizes. Please contact our sales team with your specific requirements, and we will do our best to accommodate your needs.

Q4: How do I know if the nut is properly tightened?

A: The nut should be tightened to the recommended torque value specified for your application. You can use a torque wrench to ensure the correct tightening force is applied. A properly tightened nylon lock nut will provide a secure connection without over-tightening.