Flanged nut serrated | A2 | DIN 6923
A2-70 stainless steel serrated flange nut is intended for mechanical fastenings where an integrated flange and vibration-resistant function are required. The product is manufactured according to DIN 6923, and the flange provides a larger contact surface than a standard hexagon nut.
The serrated underside grips the contact surface and counteracts loosening of the nut during vibrations and dynamic loads. The integrated flange simultaneously distributes the load over a larger area and can replace a separate plain washer in many applications.
A2 stainless steel provides good corrosion resistance in normal outdoor exposure and many industrial environments.
AREA OF USE
The flange nut is used for fastening machine parts, structural elements, fittings, and other components where a bolted joint with a large contact surface and vibration-resistant function is required.
A2 is suitable for general outdoor environments and industrial applications with moderate corrosive stress. For environments with high chloride content, such as direct marine exposure or saltwater, the suitability of A2 should be assessed based on the specific corrosion environment.
TECHNICAL SPECIFICATIONS
Product type: Flange nut
Product family: Hexagon nut with serrated flange
Material class: A2
Strength class: A2-70
Standard: DIN 6923
Thread type: Metric
Design: Hexagon with integrated serrated flange
Surface finish: Untreated stainless steel
Environment: Indoor / Outdoor
FREQUENTLY ASKED QUESTIONS (FAQ)
What is the difference between a DIN 6923 flange nut and a standard hexagon nut?
The flange nut has an integrated flange that provides a larger contact surface against the base material. The load is therefore distributed over a larger area, and a separate plain washer can be omitted in many installations. The serrated underside also helps to prevent rotation and loosening during vibrations.
What does material class A2-70 mean?
A2 indicates that the nut is manufactured from austenitic stainless steel with good corrosion resistance for many normal indoor and outdoor environments. The designation 70 indicates the strength class of the stainless steel fastener.
Can an A2-70 flange nut be used in a marine environment?
A2 has good general corrosion resistance but is not the first choice for direct exposure to saltwater or environments with high chloride content. In such applications, a suitable A4 grade is normally used after assessing the current environment.
How does the serrated flange work?
The serrations on the underside of the flange grip the contact surface when the nut is tightened. This increases the resistance to rotation and can reduce the risk of the joint loosening due to vibrations. The function also depends on the material and surface finish of the substrate.
Can the serrated flange damage the contact surface?
Yes. The serrations may leave marks or affect the surface finish on, for example, painted surfaces and softer materials. For sensitive contact surfaces, another type of nut or fastening solution should be considered.