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304/316 Stainless Steel Nyloc Nuts Nylon Insert Lock Nuts DIN 985 Standard Anti-Vibration Lock Nuts for Industrial & Automotive Use

Name: Nylon Lock Nut (Nylon Insert Lock Nut / Nyloc Nut)
Material: AISI 304/316 stainless steel (corrosion resistant, rust resistant) + heat resistant nylon insert, Q235, 45# steel + nylon insert
Standards: B/T 889.1, DIN 985, ISO 7040, EN 1661
Grade: .A2-70 (304) / A4-80 (316), Grade 8 / Grade 10 (carbon steel optional)
Specifications: M2-M36 (customizable) 
Surface Treatment: Stainless steel version with natural polish / Passivation treatment (no coating, corrosion resistant), carbon steel version electro-galvanized (blue-white zinc / color zinc), hot-dip galvanized (optional)
Design Features: Nylon insert anti-loosening structure, standard hexagonal shape, stainless steel corrosion resistant, complete specifications, easy installation
Applications: Automotive industry, machinery manufacturing, construction engineering, outdoor and marine, general assembl
Delivery Time: 15-30 days after receiving advance payment
Origin: China
Brand: JGD
Minimum Order Quantity: 10,000 pieces, negotiable
Samples: Available
Packaging: Boxed/Bulk/Pallet or customized packaging
OEM: Available

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    Key Features

    Our nylon insert lock nuts (also known as self‑locking nuts, Nyloc nuts) are available in stainless steel 304/316 (A2-70/A4-80) or carbon steel Q235/45# (Grades 8/10), with a built‑in temperature‑resistant nylon ring. When tightened, the nut threads compress the nylon ring, generating elastic clamping force that continuously grips the bolt, effectively resisting vibration loosening – compliant with DIN 985 and ISO 7040. Size range covers M2 to M36, fine or coarse threads available. Suitable for automotive chassis, industrial machinery, building steel structures, and outdoor/marine applications. Installation is the same as standard nuts – manual or torque wrench tightening, no additional locking adhesive required.
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    Precision Manufacturing Process

    We use a cold heading + tapping + nylon injection composite process. The nut body is multi‑station cold headed, then precision tapped to 6H accuracy. The nylon insert is applied via high‑temperature rotational injection – PA66 nylon is uniformly injected into the thread groove at the nut neck and cured to form a complete ring. Carbon steel parts undergo mesh belt furnace quenching + tempering (Grade 10: HV 300-350); stainless steel parts only require passivation. Surface finishing: carbon steel can be electro‑galvanized (blue/white or yellow zinc, 72h salt spray) or hot‑dip galvanized (≥50μm). Each batch is sampled for locking torque (torque difference between first and fifth installation ≤30%) and vibration loosening test (ISO 16130).
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    Transparency & Customization

    Each bag of nylon insert lock nuts comes with a full inspection report (material spectroscopy, hardness, locking torque curve, salt spray duration). The package QR code traces back to the cold heading machine, injection batch, and operator. Our website shows nylon injection videos and typical failure cases (e.g., nylon aging/cracking, thread wear).

    Customization options: Accept non‑standard across‑flats width, thickness, and nylon ring colour (natural/black/oil‑resistant grade). Nylon material can be high‑temperature grade (PA66+GF, 180°C) or low‑temperature grade (PA12, -40°C). Surface treatment offers a “combination package”: Dacromet + sealing coat. Mixed standards (DIN/ISO/GB/EN) supported. 
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    Nylon Lock · Insert Anti-Vibration · No Glue

    304/316 stainless steel nylon insert lock nut to DIN985. Built-in temperature-resistant nylon ring, elastic clamping after tightening, resists vibration loosening. Used in automotive chassis, machinery, steel structures. M2-M36 fine/coarse pitch options. Install like standard nut – no threadlocker needed.
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    Manufacturing Process

    • Multi Station Cold Heading Technology
    • Intelligent Heat Treatment System
    • Micron-Level Thread Rolling Process
    • Fully Automatic Optical Sorting
    • Environmentally Friendly Surface Treatment Line
    • Metallographic And Mechanical Joint Laboratory
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    Quality Control System

    • Raw Material Source Locking
    • Furnace Number Batch Full Traceability
    • Third Party Material Certification
    • Process Parameters Open And Transparent
    • Salt Spray Test Real Time Monitoring
    • International Standard Compliance Declaration
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    Flexible Customization Capability

    • Customizable head/slot Shapes
    • Extreme Application Of Special Materials
    • Breakthroughs In Extra Large/Long Specifications
    • Integrated Assembly Of Components
    • Customizable Surface Treatment Colors
    • Personalized Packaging And Labeling
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    Technical Service

    • On-Site Failure Analysis
    • Selection Calculation And BOM Optimization
    • Installation Tool Selection Guidance
    • Inventory Management (VMI) Trusteeship
    • Free Sample Making And Testing
    • International Standard Translation And Interpretation
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    Multi-Material & Corrosion Resistant for Industrial & Automotive Use

    Our nylon insert lock nuts are available in 304/316 stainless steel (A2-70/A4-80) and carbon steel grades 8/10, paired with temperature-resistant nylon inserts. Polished and passivated stainless steel offers natural rust protection, ideal for outdoor and marine salt spray environments. Carbon steel options with galvanized finishes provide cost-effective anti-corrosion performance. Sizes range from M2 to M36 with coarse and fine thread options, meeting diverse strength and corrosion needs for automotive chassis, industrial machinery and construction projects.
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    Nylon Insert Locking Design for Superior Vibration Resistance

    Manufactured to DIN 985 and ISO 7040 standards, the core design features a nylon insert that creates elastic clamping force on the bolt threads when tightened. This continuous grip effectively prevents loosening under vibration and alternating loads, ensuring reliable locking performance. The temperature-resistant nylon insert resists wear and aging, maintaining excellent anti-loosening properties even in high-vibration applications like automotive and industrial machinery for enhanced safety.
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    Standard Design & Easy Installation for Versatile Bulk Assembly

    With a standard hex shape, these nuts install just like regular nuts using standard wrenches or torque tools, eliminating the need for additional lock washers or thread-locking adhesives to simplify assembly. Widely applicable in automotive, machinery manufacturing, construction and general assembly, they are ideal for engineering procurement, wholesale and factory bulk supply with complete specifications and stable stock.

    Application Scenarios

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    High-Quality Nylon Lock Nut Display

    Precision Fastening, Engineered for the Future – Chengdu Jingguda Trading Co., Ltd., Your Trusted High-Quality Fastener Expert

    Chengdu Jingguda Trading Co., Ltd. is a professional fastener manufacturer integrating R&D, production, and sales. We specialize in high-precision, high-strength bolts, nuts, washers, and non-standard customized fasteners, covering international standards such as GB, DIN, ISO, ANSI, and ASME. Equipped with multi-station cold heading machines, high-speed thread rolling machines, fully automated heat treatment lines, and surface treatment equipment, we also operate an in-house laboratory featuring spectrometers, hardness testers, tensile testing machines, and salt spray testers to ensure strict quality control from raw materials to finished products. Our products are widely used in industrial machinery, renewable energy, automotive manufacturing, rail transportation, and more, known for their precision, corrosion resistance, and durability. Committed to “Fast Delivery, Professional Support,” we provide one-on-one customized solutions and efficient logistics, striving to be your ideal partner for reliable connections.

    Industrial Capabilities

    • Factory Area: 8,000 square meters
    • Certifications: ISO, IATF, CE, RoHS, JIS, ASTM
    • Manufacturing : 70+ internationally advanced production lines
    • Testing: 30+ sets of precision quality testing equipment
    • Annual Output: Up to 50,000,000 tons  
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    From Raw Materials to Completed Items

    Closed-loop manufacturing from raw materials to final products is made possible by our factory's fully automated production lines for cold heading, precision thread rolling, controlled-atmosphere heat treatment, and environmentally friendly surface finishing. Each fastener satisfies strict requirements for strength, precision, and surface quality due to inline optical sorting and a digital MES. You promise the greatest fasteners—reliable, effective, and environmentally responsible.

    Lab for Innovation:

    Do you have any ongoing projects? Now let's go on. Our development is driven by skill and effort, and we are constantly searching for fresh ideas. Are you working on a project? Now let's go on.

    "Customized Implementation" to "Pain Point Diagnosis" in the Whole Joint R&D Process

    We offer more than just conventional components. Our multicultural engineering staff actively participates in your project from the start. To ensure that creative concepts are swiftly turned into workable solutions that reduce overall lifespan costs, we thoroughly analyze the application context and tailor solutions in the lab, fully integrating technology and application.
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    Integrated Verification System: Ensuring Innovation with "Test Data"

    The drawing board is not where the creative process ends. Through our internal technical center, we provide one-stop verification for anything from corrosion testing to prototype creation. Through extensive simulated working condition tests, we use empirical data to confirm the performance stability of tailored solutions. This significantly reduces project risks while also attaining truly reliable cost reduction and efficiency improvement.

    Rapid Service Response

    Strategically plan production using digital quality control and agile supply chains to reduce bulk order delivery time by 30% after confirmation; use self-developed molds and flexible manufacturing lines to complete sample and delivery within 7 days. You may be able to take advantage of market opportunities for both standard bolts and custom-shaped parts with our "Demand-Solution-Sampling-Production" closed-loop system.
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