A serrated flange nut is a one-piece fastener that combines a hex nut and a wide, integrated washer (flange) with small teeth (serrations) on the underside, offering a quicker assembly process and superior resistance to loosening from vibration. The serrations bite into the connected material to maintain the nut's holding power, eliminating the need for a separate washer.
The Custom Low Profile Serrated Hex Flange Nut With Dacromet Finish is a high-performance one-piece fastener that integrates a hex nut, a wide integrated washer (flange), and small serrations on the underside. Designed to streamline assembly and enhance connection reliability, this serrated hex flange nut eliminates the need for separate washers while delivering superior resistance to loosening caused by vibration. Its low-profile design and Dacromet finish make it ideal for applications requiring space efficiency and corrosion protection, complying with global standards like DIN6923, IFI 145, and ISO4161. Whether for automotive, machinery, or petrochemical use, this fastener combines functionality and durability to meet industrial demands.
The precision-engineered serrations on the flange’s underside bite firmly into the mating surface, creating a strong mechanical grip that prevents the nut from vibrating loose. This critical feature makes the serrated flange nut indispensable in high-vibration environments such as vehicles and heavy machinery.
The built-in wide flange acts as a washer, spreading the load over a larger area. This not only reduces pressure on the joined material (avoiding cracks or damage) but also eliminates the need for additional washers, simplifying inventory management.
By combining nut and washer functions into one component, the low profile serrated hex flange nut cuts down assembly time and reduces the number of parts required. This translates to cost savings and increased efficiency for manufacturing and installation teams.
The serrations provide a consistent mechanical lock, ensuring the connection remains tight even under dynamic forces. Unlike adhesive-based locking solutions, this design maintains holding power without relying on external agents.
The Dacromet finish, along with optional zinc plating, black oxide, or nickel coatings, delivers excellent corrosion resistance. Since no separate locking agents are needed, the risk of chemical-induced corrosion in critical applications is minimized.
Parameter | Details |
Standard | DIN6923/IFI 145/ISO4161/ASME B 18.16.4/ANSI B18.2.2 |
Size | 1/8"-1", M4-M24 |
Material | Carbon Steel, Alloy Steel, Stainless Steel (SS304/SS316), etc. |
Grade | ASTM Gr.2, Gr.5, Gr.8, 2H, Gr.10, SS304, SS316, etc. |
Thread | UNC, UNF |
Finish | Dacromet, Plain, Zinc Plated (Clear/Blue/Yellow/Black), Black Oxide, Nickel, Magni, Geomet, H.D.G., Electrophoresis |
Packing | Bulk in cartons (25kg Max.) + wood pallet, or custom packaging |
Test Equipments | Caliper, Go&No-go gauge, Tensile test machine, Hardness tester, Salt spraying tester, etc. |
Supply Ability | 1000 tons per month |
MOQ | 1000kgs per specification |
Ideal for automotive components (engine mounts, suspension systems), industrial machinery (pumps, motors), and heavy equipment where vibration-induced loosening is a major concern.
The corrosion-resistant finish and secure locking make these serrated hex flange nuts suitable for outdoor and harsh environments, such as photovoltaic panel installations and petrochemical pipelines.
Widely used in manufacturing lines, agricultural machinery, and electrical equipment, providing reliable fastening for components requiring frequent assembly and disassembly.
Check Thread Compatibility: Ensure the bolt’s thread size (e.g., M8, 1/2") and pitch match the nut’s internal threading to avoid cross-threading.
Verify Surface Suitability: Confirm the mating surface can withstand serration marks (avoid sensitive or coated surfaces unless using non-serrated alternatives).
No Washer Required: The flange replaces separate washers—skip washer installation to save time.
Align & Insert Bolt: Pass the bolt through the components to be joined, ensuring proper alignment.
Thread the Nut: Screw the Custom Low Profile Serrated Hex Flange Nut onto the bolt by hand to start the thread.
Tighten to Recommended Torque: Use a wrench to tighten the nut to the specified torque—serrations will bite into the surface, forming a secure lock.
Check Secure Fit: Confirm the nut does not loosen when subjected to light vibration (e.g., tapping the assembly gently).
Reusability Guidelines: These nuts can be reused multiple times without significant performance loss, but refer to manufacturer torque recommendations for re-installation.
We are a direct manufacturer with our own international sales department—we produce and sell all products in-house, ensuring competitive pricing and quality control.
Yes, we accept custom orders for non-standard sizes, materials, finishes, or designs. Please provide drawings, photos, or samples for accurate quoting.
We conduct inspections after every production process and 100% inspection of finished products per customer requirements and international standards. Test reports (material, hardness, corrosion) are available upon request.
Lead time varies by order quantity and specification, but we typically deliver bulk orders within 15-35 days. Urgent orders are supported with fast delivery options.
MO1000kgs per specification (negotiable for large-volume or custom orders).
Trade Terms: FOB/CIF/CFR/CNF/EXW/DDU/DDP.
Payment Methods: T/T (30% deposit + 70% balance against document copy), L/C, or other mutually agreed terms.
Customization: Accept non-standard designs—provide technical drawings or samples for a tailored solution.
With over a decade of experience in the fastener industry, our main markets cover North & South America, and we are proficient in IFI standards to meet global customer needs.
We offer a full range of fasteners, hardware, and custom parts, providing customers with integrated procurement solutions to save time and costs.
All products comply with international standards (DIN, ISO, ASME) and undergo rigorous testing (tensile, hardness, salt spray) to ensure durability and performance.
We provide free samples for quality verification and offer professional technical support to assist with product selection, installation, and customization.
