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The Black Zinc Rivet Nuts, compliant with DIN7340 standards, are specialized knurled blind rivet fasteners designed for creating secure internal threads in thin materials with limited access. These cylindrical nuts feature a textured knurled exterior for superior grip and anti-rotation during installation, paired with a black zinc or black oxide coating that provides robust corrosion and wear resistance. Constructed from carbon steel in grades 4.8 to 12.9 or stainless steel for enhanced durability in humid conditions, the black zinc plating offers a sleek, rust-protective finish ideal for aesthetic and functional applications, while black oxide enhances friction resistance in high-abrasion settings. Available in metric sizes M3 to M12, these rivet nuts enable efficient blind-side riveting, eliminating the need for welding or tapping in sheet metal or tubes. Perfect for metalworking, automotive panels, and furniture frames, they ensure reliable, vibration-resistant connections. Manufactured by Duojia in Hebei, China, with ISO9001, ISO14001, and ISO45001 certifications, these coated DIN7340 knurled rivet nuts deliver high-performance solutions for heavy and general industries, supporting bulk orders with 10,000 pieces monthly capacity and global exports for professionals seeking durable, easy-to-install threading options in challenging environments.
Engineered for blind installation, the Black Zinc Rivet Nuts incorporate knurled walls that embed firmly into workpieces, providing stable threads where backside access is impossible. The black zinc coating delivers moderate corrosion protection with a matte black appearance for discreet integration, while black oxide offers a chemical-treated surface that boosts wear resistance without adding bulk. Made from carbon steel or stainless steel, these nuts support internal threading compatible with standard bolts, with precise dimensions ensuring a snug fit in drilled holes. Duojia’s manufacturing includes stamping and threading for consistency, verified by SGS certification. To install, drill a matching hole, insert the nut, and use a riveting tool to expand it—manual or pneumatic options work seamlessly. Maintenance involves checking the coating for integrity; repair scratches on black zinc with anti-rust agents or clean black oxide surfaces to preserve properties. Suited for automotive body mounts, sheet metal fabrication, and structural light-duty joins, these rivet nuts minimize installation time and enhance load-bearing in thin materials. With minimum orders of 100 pieces, 14-30 day delivery, and packaging in cartons or pallets, they are distributed worldwide, offering versatile fastening for industries requiring aesthetic, protective finishes.
| Parameter | Details |
|---|---|
| Product Name | Black Zinc Rivet Nuts – DIN7340 Knurled Blind Rivet Nuts |
| Material | Stainless Steel; Carbon Steel options |
| Grade | 4.8, 8.8, 10.9, 12.9, A2-70, A4-70, A4-80, etc. |
| Surface Treatment | Black Zinc Plated, Black Oxide Coated |
| Nominal Diameter (d max) | 3mm, 4mm, 5mm, 6mm, 8mm, 10mm |
| Outer Diameter (d2 max) | 5.5mm, 7.5mm, 9.5mm, 11.5mm, 15.5mm, 18mm |
| Inner Diameter (d3 min) | 2.85mm, 3.8mm, 4.8mm, 5.8mm, 7.75mm, 9.75mm |
| Length (e max) | 1.5mm, 2mm, 2.5mm, 3mm, 4mm, 5mm |
| Knurl Thickness (k max) | 0.8mm, 1mm, 1mm, 1.2mm, 1.2mm, 1.4mm |
| Standards | DIN7340, ISO9001, ISO14001, ISO45001, SGS |
| Corrosion Resistance | Moderate to high, depending on coating |
| Packaging | Small Pack + Carton + Pallet or Bag/Box with Pallet |
| Minimum Order | 100 Pieces |
| Supply Ability | 10,000 Pieces per Month; 500 Tons per Month |
| Delivery Time | 14-30 Days based on quantity |
These Black Zinc Rivet Nuts stand out with their knurled design, which provides exceptional anti-slip embedding in thin substrates, ensuring stable, rotation-free threads for repeated bolting. The black zinc plating offers a corrosion-resistant barrier with a low-glare finish, ideal for visible installations, while black oxide coating adds superior abrasion resistance for high-friction environments without compromising grip. Built from stainless steel or carbon steel, they deliver impressive strength across grades, with internal threads that accommodate various bolt sizes seamlessly. Compliant with DIN7340, the blind riveting mechanism simplifies one-sided assembly, reducing tools and time. Duojia’s customizable options include coating variations, all tested for durability and adhesion. These nuts resist vibration effectively, making them reliable in dynamic settings, and the coatings maintain integrity under exposure without flaking. Their compact form minimizes material distortion, supporting lightweight yet sturdy connections. Eco-conscious production ensures sustainability, and the design eliminates welding, cutting emissions. This fusion of features provides a versatile, low-maintenance fastener that enhances assembly efficiency, aesthetic appeal, and long-term reliability in demanding applications.
Black Zinc Rivet Nuts are versatile for blind threading in thin or hollow materials across diverse sectors. In automotive industries, they secure body panels and mounts, where the knurled grip withstands vibrations and the black coatings blend seamlessly with dark finishes. Furniture and cabinetry benefit from their use in metal frames, enabling strong joints without backside access and protecting against wear in high-use areas. Sheet metal fabrication employs them for enclosures and brackets, with black oxide resisting abrasion in industrial handling. Construction applications include light structural fixes, such as attaching components to hollow tubes or profiles, leveraging the corrosion protection for indoor/outdoor durability. Electronics housings utilize these nuts for discreet, secure threading in compact designs. Duojia’s globally exported products support custom uses in appliances and machinery, with simple riveting tools facilitating quick setups. Maintenance is minimal, involving coating checks to prevent rust, ensuring prolonged performance. Their adaptability reduces assembly complexity, improving safety and efficiency in both heavy-duty manufacturing and general DIY projects worldwide.
