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304/316 Stainless Steel Split Lock Washers - China Suppliers & Factory for Anti-Vibration Fastening Solutions

Spring Washer (Split Lock Washer / Spring Lock Washer) manufactured by a leading China factory, made from premium materials including AISI 304/316 stainless steel for excellent corrosion and rust resistance, and 5Mn spring steel known for superior elasticity and high hardness. Our spring washers meet internationally recognized standards such as GB/T 93, DIN 127, ISO 7090, and ANSI B18.21.1, ensuring consistent quality and reliability. Available in grades A2 (304 stainless) / A4 (316 stainless) and 65Mn manganese steel/spring steel, with customizable specifications ranging from M1.6 to M64 to fit diverse industrial needs, Featuring a split elastic structure for high elasticity and rebound, these washers offer full-range corrosion resistance and easy installation, making them ideal for machinery manufacturing, automotive industry, construction engineering, general assembly, as well as outdoor and marine applications. Surface treatments include natural polishing and passivation for stainless steel (without coating to maintain corrosion resistance), and options for electroplated zinc or blackening treatments for carbon steel versions, As experienced China suppliers and factory, we guarantee prompt delivery within 15-30 days after advance payment, with a minimum order quantity of 10,000 pieces, negotiable for bulk orders. Samples are available upon request. Packaging options include boxed, bulk, pallet, or customized solutions to meet your logistics requirements. OEM services are also offered to support your branding and product customization needs. Trust our factory as your reliable spring washer supplier in China, committed to high quality, competitive prices, and excellent service
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    Key Features

    Our self-tapping screws are crafted from food-grade 304 stainless steel and treated to achieve metric Grade 12.9 ultra-high strength, overcoming the traditional hardness limitations of standard stainless steel. Featuring a countersunk Phillips head design, these screws can be installed flush with the workpiece surface for a zero-profile finish, making them ideal for precision electronics and architectural decoration. We have optimized the thread geometry for different substrates (metal, wood) to ensure low-torque driving with high-torque clamping, effectively preventing stripping. As a superior alternative to standard Tek screws, these fasteners perform exceptionally well in thin sheet metal connections, providing an intelligent fastening solution that balances aesthetics with high load-bearing capacity.
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    Precision Manufacturing Process

    From wire rod to finished product, we strictly adhere to multiple international standards including ISO, DIN, ANSI, and GB. Utilizing multi-station cold forging technology, we ensure shank diameter tolerances are controlled within microns. Threads are formed through a precision thread rolling process to enhance fastening force. For non-standard requirements, we employ optical imaging sorters to reject minute defects like head cracks. In post-treatment, we offer a wide range of surface finishing options: from conventional zinc plating and nickel plating to highly corrosion-resistant Hot-Dip Galvanizing (H.D.G.), as well as decorative polishing and black anodizing. We even provide food-grade passivation treatment, ensuring every screw has a prolonged fatigue life in demanding environments.
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    Transparency & Customization

    As a source factory, we are committed to breaking down the information barriers of traditional trade. From mill certificates for raw materials to hardness grades (covering Grade 4.8 to Grade 12.9, as well as A2-70 and A4-80 marine-grade stainless steel), all test data is traceable. We support full-chain customization: dimensionally, we can adjust thread length and head thickness according to drawings; functionally, we can combine processes like sandblasting, electrophoretic coating (e-coating) , or chrome plating. Whether you need British Standard (BS) fasteners or require a special colored anodized finish, we offer small-batch sampling. This ensures that when you purchase fasteners from us, you not only receive high-quality products but also full transparency and control over the entire process, from material selection to packaging.
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    No Pre-Drilling · Rust Resistant · More Secure

    This stainless steel Phillips countersunk self-tapping screw, with its rust-resistant and corrosion-resistant material, one-step self-tapping design, and aesthetically pleasing countersunk head structure, has become the preferred solution for metal substrate fastening scenarios that is efficient, reliable, and aesthetically pleasing.
    Product Details

    Manufacturing Process

    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
    Quality Control System

    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
    Flexible Customization Capability

    Flexible Customization

    • 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
    Technical Service

    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
    Rust-proof Stainless Steel

    Rust-proof & Corrosion-resistant Material

    Our AISI 304/316 stainless steel (grade A2/A4) contains high chromium content, forming a dense passivation film on the surface that completely isolates oxygen and moisture. Even after long-term exposure to marine climates, chemical environments, or rain, it remains bright and free from red rust or pitting. Ideal for harsh conditions such as marine, food equipment, and outdoor construction.

    Long Service Life

    Long Service Life with High Wear Resistance

    The passivated stainless steel split washer has high surface hardness with no plating peeling issues. During repeated assembly and disassembly, the washer contact surfaces resist wear, galling, or deformation. The elastic split structure has passed fatigue tests, enduring hundreds of thousands of cycles without permanent deformation, maintaining anti-loosening performance over the long term.

    Anti-Loosening

    Metal Material for Tightening & Anti-Loosening

    The core function is to generate continuous clamping force through elastic deformation. 65Mn spring steel and 304/316 stainless steel provide excellent tensile strength. When tightened, the split washer stores elastic energy that pushes back against the nut, increasing friction torque and resisting loosening caused by vibration. Stable clamping force from -40°C to high temperatures.

    Application Scenarios

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    High-Quality Spring Washer Display

    Frequently Asked Questions

    Q1: What materials are available for your split lock washers?
    We primarily offer AISI 304 and 316 stainless steel (Grade A2/A4) for superior corrosion resistance, as well as 65Mn spring steel for high-elasticity applications.
    Q2: Do these washers comply with international standards?
    Yes, our products are manufactured in strict accordance with international standards such as DIN 127 and other relevant mechanical specifications.
    Q3: Can I request customized sizes or surface treatments?
    Absolutely. We offer flexible customization for head/slot shapes, special materials, extra-long specifications, and various surface treatment colors.
    Q4: How do you ensure the quality of each batch?
    We implement a full traceability system based on furnace numbers, conduct real-time salt spray monitoring, and use fully automatic optical sorting to ensure 100% compliance.
    Q5: Are samples available for testing?
    Yes, we provide free sample making and testing services to help you verify the selection and performance before placing a bulk order.
    Q6: What is the typical temperature range for these washers?
    Our metal lock washers maintain stable clamping force and structural integrity in environments ranging from -40°C to high industrial temperatures.