Zinc-Nickel Nylon Insert Lock Nut (Nyloc Nut) Product Introduction
1. Brief Overview
Zinc-nickel nylon lock nut (also named Nyloc nut, prevailing torque hex lock nut) is a high-performance anti-loosening fastener manufactured per DIN985 / DIN982 / ISO7040 standards. It combines high-strength carbon steel substrate, premium zinc-nickel alloy electroplating coating and integrated PA66 nylon locking ring, delivering outstanding vibration resistance and ultra-long anti-corrosion service life for automotive, machinery, new energy and coastal industrial assemblies.
2. Core Structural & Functional Advantages
(1) Reliable Nylon Anti-Locking Mechanism
Built-in elastic polyamide 6.6 insert forms interference fit with bolt threads during installation. The nylon ring generates stable prevailing torque to create continuous radial friction force, effectively preventing nut loosening under strong vibration, shock and thermal cycling.
- No extra lock washer or thread locker required; simplifies assembly process and cuts spare part cost
- Reusable for 10–15 assemble-disassemble cycles while maintaining standard locking performance, compliant with ISO2320 anti-loosening test
- Wide working temperature range: -40℃ ~ +140℃, resistant to motor oil, grease and most industrial solvents
(2) Superior Zinc-Nickel Alloy Anti-Corrosion Coating
Compared with ordinary galvanized nuts, zinc-nickel plating provides dramatic corrosion improvement:
- Neutral salt spray test (NSS): ≥720 hours without red rust; premium formula reaches over 1000 hours, far exceeding common zinc plating (only 96h)
- Dual protection: sacrificial anode protection + dense barrier film. Corrosion products are compact with low expansion, no thread blockage after long-term service for easy disassembly
- Hexavalent chromium free, fully RoHS compliant, suitable for automotive export and electronic equipment
- Uniform, smooth plating layer with excellent adhesion, resistant to scratch and wear during installation
(3) Stable Mechanical Performance
- Substrate: Grade 8 / Grade 10 carbon steel with standardized heat treatment, high tensile strength and stable torque-tension output
- Precise thread machining, consistent tolerance, compatible with standard metric bolts M2–M30
- Hexagonal outer shape fits standard spanners and air impact wrenches, supporting automated mass assembly
3. Main Executive Standards
- Dimensional standards: DIN985 (low-profile), DIN982 (high-profile), ISO7040, GB/T889.1
- Mechanical property: ISO898-2
- Anti-loosening performance: ISO2320
- Anti-corrosion test: ISO9227 salt spray test
- Coating specification: Zinc-nickel alloy plating (Ni content 12–16%)
4. Wide Application Scenarios
- Automotive industry: chassis, suspension, new energy vehicle battery packs, engine peripheral parts, off-road vehicles (ideal for wet & saline road conditions)
- Heavy machinery: construction equipment, agricultural machinery, hydraulic components, mining facilities
- Outdoor & coastal equipment: wind power brackets, marine fittings, outdoor power cabinets, coastal engineering hardware
- General industrial manufacturing: conveyors, compressors, generators, automation equipment, railway transit components
5. Customization Support
- Sizes: Full metric series M2 to M30; imperial sizes available upon request
- Plating finish: Silver zinc-nickel, black zinc-nickel optional
- Custom service: Laser marking logo, special packaging, flange type nylon lock nuts, special mechanical grades
Short Version (For Alibaba Product Title & Short Description)
Title
Zinc Nickel Plated Nylon Insert Lock Nut DIN985 DIN982 Grade 8 Carbon Steel Anti-Vibration Nyloc Lock Nut, High Salt Spray Corrosion Resistant for Automotive Machinery
Short Description
Our zinc-nickel nylon lock nuts adopt PA66 anti-loosening ring and high anti-corrosion Zn-Ni coating, passing 720h+ salt spray test. Vibration-proof, reusable, RoHS compliant. Sizes M2-M30, meet DIN/ISO standards, widely used in auto, new energy and coastal industrial equipment. Custom sizes & surface finishes acceptable.