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China Suppliers - Flange Hex Nuts A2-70/A4-80, Serrated Anti-Slip Flange Nuts Factory, DIN 6923 Standard

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Name: Flange Hex Nut (Serrated Flange Nut)
Material: AISI 304/316 stainless steel (corrosion-resistant, rust-resistant), 45# steel / 10B21 alloy steel
Standards: GB/T 6177.1, DIN 6923, ISO 4161, EN 1661
Grade: Stainless steel A2-70 (30/ A4-80 (316), carbon steel grade 8 / grade 10
Specifications: M3-M24 (customizable) 
Surface Treatment: Natural polishing / Passivation treatment (no coating, corrosion-resistant), electro-galvanizing (blue-white zinc/color zinc), hot-dip galvanizing, Dacromet treatment (optional, enhances rust prevention and wear resistance)
Design Features: One-piece flange molding, serrated anti-slip design, high-precision threads, corrosion-resistant stainless steel, easy installation
Applications: Widely used in the automotive industry, machinery manufacturing, construction engineering, outdoor and marine applications, and general assembly
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
As a reputable Flange Hex Nut supplier and factory in China, we offer high-quality products tailored to meet your specific needs.

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    304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws01
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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

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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
    Stainless Steel Flange Hex Nuts

    Multi-Material & Full Strength Series

    Our flange hex nuts are made of AISI 304/316/201 stainless steel or 45#/10B21 alloy steel, with strength grades including stainless steel A2-70 (304), A4-80 (316), and carbon steel grades 8/10. The 316 stainless steel variant offers excellent chloride corrosion resistance, passing ≥720 hours of salt spray testing to withstand coastal and humid environments. Carbon steel options with electro galvanizing, hot-dip galvanizing, or Dacromet coating balance high strength and rust/wear protection. Thread sizes range from M3 to M24 with custom options available.
    Serrated Anti-Slip Design

    Integrated Flange + Serrated Anti-Slip Design

    Manufactured to international standards including DIN 6923, GB/T 6177.1, and ISO 4161, our nuts feature an integrated flange and serrated anti-slip base. The flange replaces flat washers to distribute pressure evenly and protect workpiece surfaces, while the serrated teeth bite into the contact surface during tightening to create a mechanical lock against vibration-induced loosening. This dual-protection design ensures stable performance under alternating loads in high-dynamic applications.
    Washerless Quick-Install

    Washerless Quick-Install Design

    The one-piece structure eliminates the need for separate flat washers, simplifying installation: simply thread the nut onto the bolt and tighten with a standard wrench, with the flange providing automatic alignment. Stainless steel nuts with passivated/polished finishes are suitable for hygiene-sensitive applications without coating contamination, while galvanized carbon steel versions offer enhanced corrosion resistance for outdoor use.
    Application Scenarios
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    High-Quality Stainless Steel Flange Nut Display
    Frequently Asked Questions
    What materials are available for your flange hex nuts?
    We offer AISI 304, 316, and 201 stainless steel, as well as high-strength carbon steel (45# and 10B21) with various coatings like galvanizing and Dacromet.
    What international standards do your products follow?
    Our manufacturing strictly adheres to DIN 6923, GB/T 6177.1, and ISO 4161 standards to ensure global compatibility and quality.
    What is the advantage of the serrated flange design?
    The serrated base creates a mechanical lock against the contact surface, providing excellent resistance to loosening caused by high-dynamic vibrations.
    Can you provide customized sizes and surface treatments?
    Yes, we support thread sizes from M3 to M24 and offer flexible customization for special materials, extra-long specifications, and specific surface treatment colors.
    Do you provide technical support and testing samples?
    Absolutely. We offer free sample making, on-site failure analysis, selection calculations, and full material traceability through our joint laboratory.