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No matter new customer or outdated client, We believe in extensive phrase and trusted relationship for Coupling Nut,Hex Coupling Nut,Threaded Sleeve Nut,Connecting Nut,Extension Nut, We recognize your enquiry and it can be our honor to work with each mate globally.
Coupling Nut, Based on our guiding principle of quality is the key to development, we continually strive to exceed our customers' expectations. As such, we sincerely invite all interested companies to contact us for future cooperation, We welcome old and new customers to hold hands together for exploring and developing; For more information, be sure to feel free to contact us. Thanks. Advanced equipment, strict quality control, customer-orientation service, initiative summary and improvement of defects and extensive industry experience enable us to guarantee more customer satisfaction and reputation which, in return, brings us more orders and benefits. If you are interested in any of our merchandise, make sure you feel free to contact us. Inquiry or visit to our company are warmly welcome. We sincerely hope to start a win-win and friendly partnership with you. You can see more details in our website.

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    SS316+SCM435 M6 M5.5 Hex Head Composite Self Drilling Bi-Metal Screw

    You can rest assured to buy SS316+SCM435 M6 M5.5 Hex Head Composite Self Drilling Bi-Metal Screw from our factory.
    Material:stainless steel;Hot rust treasure;mechanical zinc plating;Dacromet;Ruspert
    Grade：SS304 SS316 SS410 SCM435
    Min Order: 100PCS each size
    Sample: Free sample
    Package: Carton+Pallet
    Standard: DIN,ASTM/ASME,JIS,EN,ISO,AS,GB
    Delivery time:7-30days
  • Flat Head Hex Bolt

    Flat Head Hex Bolt

    The flat head hex bolt in stock are cheap and of high quality. You can wholesale it at the right price from Gangtong Zheli, which is a leading manufacturer and supplier from China. Flat Head Hex Bolt strictly adheres to international and national standards such as ISO 10642, DIN 7991, and GB/T 5786. Manufactured from high-quality carbon steel, alloy steel, or stainless steel, it offers a variety of thread sizes (e.g., M3-M20), lengths (10mm-200mm), and surface treatment options to meet installation requirements under different working conditions.
  • Yellow Zinc Plated Galvanised Carbon Steel 4.8 5.8 Hex Flange Head Concrete Screw Bolt

    Yellow Zinc Plated Galvanised Carbon Steel 4.8 5.8 Hex Flange Head Concrete Screw Bolt

    The following is the introduction of high quality Yellow Zinc Plated Galvanised Carbon Steel 4.8 5.8 Hex Flange Head Concrete Screw Bolt, hoping to help you better understand Yellow Zinc Plated Galvanised Carbon Steel 4.8 5.8 Hex Flange Head Concrete Screw Bolt.
    Name:Yellow Zinc Plated Galvanised Carbon Steel 4.8 5.8 Hex Flange Head Concrete Screw Bolt
    Material:carbon steel
    Grade:12.9 10.9 9.8 8.8 6.8 5.6 4.8 4.6 3.6
    Finishing:Zinc,HDG,Black,Geomet,Dacroment,Anodized
    Application:solar panel system
    Certificate:ISO9001:2015
    Packing:Cartons+Pallets
    delivery time:7-30days
  • M8 M10 Stainless Steel A2-70 DIN6334 Hex Coulping Nut

    M8 M10 Stainless Steel A2-70 DIN6334 Hex Coulping Nut

    Gangtong Zheli is M8 M10 Stainless Steel A2-70 DIN6334 Hex Coulping Nut manufacturers and suppliers in China who can wholesale it.
    Coupling nuts are used to make up long tie rod assemblies from shorter lengths of rod and to facilitate assembly of two fasteners or fittings which each have external threads.
  • Zinc Plated Hex Socket Cap Head Machine Screws

    Zinc Plated Hex Socket Cap Head Machine Screws

    We offer Zinc Plated Hex Socket Cap Head Machine Screws with stable tensile strength. Multiple surface finishes are available for molds, machinery and automation equipment. In-stock goods enable fast global shipment. Ningbo Gangtong Zheli Fasteners Co., Ltd. provides standard and custom sizes with complete quality inspection.
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  • What is a bi-metal screw?

    ​A bi-metal screw is a type of screw designed for specific applications where temperature changes or electrical currents are factors. It consists of two different metals bonded together: typically steel and copper or steel and aluminum. The head of the screw is made of one metal, while the threaded portion is made of another.

  • Upgraded Quality Control System & New Fastener Production Line Put into Use

    This news introduces our factory’s 2026 production line and quality control system upgrade. With years of manufacturing experience, professional process control, authoritative certifications and complete service system, we enhance product stability and supply capacity to better serve global B2B buyers, engineering contractors and overseas importers.

  • Surface treatment of bolts

    A thick zinc layer is formed on the surface of the bolt, providing long-term corrosion protection, suitable for outdoor and humid environments.

  • 2026 Global Fastener Industry: Digital Manufacturing & Smart Quality Control Lead the New Upgrade

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  • What Types of Materials Can Be Joined with Blind Rivets?

    Blind Rivets is a type of mechanical fastener that is used to join two pieces of material together. It is known for its ability to be installed from one side of the workpiece and is commonly used in situations where access to the opposite side is limited. Blind rivets consist of a mandrel, which is pulled through the rivet body, deforming it and creating a joint.

  • What is a spring washer for?

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