Nuts · DIN 6923
DIN 6923 Flange Nut
Accurate Fastners manufactures cold forged DIN 6923 hexagon flange nuts in stainless steel grades SS 304 and SS 202, covering metric sizes M5 through M12. These nuts are produced to DIN 6923 geometry and are available for domestic and international supply.
- Standard
- DIN 6923
- Grades
- 304 / 202
- Size
- M5 – M12
- Length
- —
Overview
What is the DIN 6923 Flange Nut?
A DIN 6923 flange nut is a hexagon nut with an integrated circular flange formed as a single cold forged component. The flange extends radially beyond the hex faces, effectively providing a built-in bearing washer. This eliminates the need for a separate flat washer in many assemblies and distributes the clamping load across a broader contact area on the mating surface.
The nut features a standard metric internal thread and an external hex drive, allowing it to be tightened with conventional spanners and socket sets. The flange face is typically smooth or may carry serrations on the underside, depending on the variant. DIN 6923 defines the dimensional envelope—hex width across flats, flange diameter, and nut height—ensuring interchangeability within the standard.
Cold forging, the manufacturing process used by Accurate Fastners for this product, shapes the nut from stainless steel rod stock under high compressive force without removing material. This production method generally produces a component with a uniform grain structure, consistent dimensional form across a batch, and minimal internal voids—characteristics that matter when large quantities of identical parts are required in an assembly line environment.
In Depth
Product description
Construction & Geometry
The DIN 6923 flange nut consists of a hexagonal body with an integral circular flange at its bearing face. The hex section accepts an external hex drive tool, while the flange—wider than the hex across-flats dimension—acts as a load-spreading collar. Both the hex and flange are formed in a single cold forging operation, so there is no joint or weld between the two elements.
Metric internal threading runs through the full height of the nut body, sized to engage standard metric bolts or threaded studs of the corresponding pitch. Within the M5–M12 range supplied by Accurate Fastners, each size corresponds to specific DIN 6923 dimensional requirements governing flange diameter, nut height, and thread pitch, maintaining consistent fit with mating fastener components.
Functional Behaviour in an Assembly
When tightened, the underside of the flange bears directly against the substrate, spreading the compressive clamp force over an area larger than a plain hex nut would provide. This wider bearing footprint may reduce surface pressure on softer or thinner materials, lowering the likelihood of the nut pulling through or embedding into the substrate during tightening in certain assembly conditions.
Because the flange is integral, the component count in an assembly is reduced compared with using a plain nut paired with a separate washer. Fewer loose parts can simplify assembly handling and reduce the chance of a washer being omitted during production. The external hex drive is compatible with standard torque tools, making the nut straightforward to incorporate into existing assembly procedures.
How It Differs from Similar Fasteners
A standard DIN 934 hexagon nut has a flat bearing face with no flange; it requires a separate washer when load spreading is needed. The DIN 6923 flange nut combines both functions in one piece. Compared with a flange bolt, the flange nut is the threaded female component and is used on the nut side of a bolted joint rather than the bolt head side.
Some flange nuts are available with serrations on the flange underside that resist loosening under vibration; others have a smooth flange face. Both variants fall within DIN 6923. Buyers should confirm which flange face type is required for their application. Accurate Fastners' sales team can advise on available variants within the M5–M12 range in SS 304 and SS 202.
Material & Grade
Material and grade information
- SS 304
- SS 202
SS 304, an austenitic stainless steel, is among the more widely used grades for fasteners in general industrial and process environments. It contains chromium and nickel, which together support corrosion resistance in many everyday atmospheric and mildly corrosive conditions. Accurate Fastners supplies DIN 6923 flange nuts in SS 304 for applications where a proven, broadly compatible stainless grade is appropriate and the environment does not present aggressive chemical exposure.
SS 202 is an austenitic stainless steel in which manganese and nitrogen partially substitute for the nickel content found in SS 304. It is commonly selected where cost considerations are a factor and where the service environment is less demanding than that which would require SS 304 or higher grades. For applications involving highly corrosive media, chlorides, or elevated temperatures, buyers are advised to discuss grade suitability with the Accurate Fastners technical sales team before ordering.
Grades shown are those documented for this product in the Accurate Fastners brochure. General material notes are guidance only; confirm grade selection for your environment.
Technical Data
Technical specifications
| Product type | Nut – DIN 6923 Flange Nut |
|---|---|
| Material | Stainless steel |
| Material grade | SS 304, SS 202 |
| Applicable standard | DIN 6923 |
| Nominal diameter / size | M5 – M12 |
| Thread type | Metric internal thread |
| Head / form | Hexagon with integrated flange |
| Drive / tightening | External hex |
| Manufacturing process | Cold forged |
Sizes
Available sizes
Documented size range
M5 – M12
Documented length range
Not applicable
Individual sizes within the documented range, thread pitches and lengths are confirmed at quotation stage.
Applications
Industrial applications
Solar Panel Mounting Structures
Flange nuts are commonly used to fasten panel frames and sub-structures to mounting rails, where a wider bearing face may reduce surface indentation on aluminium extrusions and simplify assembly with fewer loose components.
RO Water Purifier Assemblies
In water treatment equipment, stainless steel flange nuts may be used to secure filter housings and pipework brackets, where corrosion resistance of SS 304 or SS 202 is relevant to the wet operating environment.
Food & Beverage Machinery
Machine frames and guards in food processing lines are frequently fastened with stainless steel nuts to meet hygiene material requirements; the integrated flange reduces crevices that could otherwise accumulate contaminants between a nut and separate washer.
Pharmaceutical Machinery
Stainless steel hardware is commonly specified in pharmaceutical equipment fabrication; DIN 6923 flange nuts in SS 304 may suit panel and frame assembly where material traceability and corrosion resistance are part of the equipment specification.
LED Lighting Structures & Enclosures
Mounting brackets, junction boxes, and luminaire housings for LED installations may use M5–M12 flange nuts where a compact stainless fastener with an integral bearing face simplifies the assembly of sheet steel or aluminium enclosures.
Featured for: Solar Energy
Features & Selection
Features and selection considerations
Design features
Integral Flange Bearing Face
The circular flange is cold forged as one piece with the hex body, providing a wider load-bearing contact area without requiring a separate washer component in the assembly.
Cold Forged Construction
Cold forging shapes the nut under compressive force, producing a component with consistent dimensional form and uniform material grain structure across production batches.
Standard External Hex Drive
The hexagonal outer profile accepts conventional spanners and socket tooling, making these nuts compatible with standard torque application equipment already in use on most assembly lines.
Metric Internal Thread
Full-height metric threading is sized to DIN 6923 requirements, ensuring compatibility with standard metric bolts and threaded studs within the corresponding size and pitch.
Available in SS 304 and SS 202
Two stainless steel grades are offered, allowing buyers to select the grade that best matches their environmental conditions and project cost parameters within the M5–M12 range.
Before you order
Confirm Size and Thread Pitch
Specify the nominal diameter (M5 through M12) and confirm the standard metric thread pitch for that size. Ensure the chosen nut size matches the bolt or stud already specified for the assembly.
Select the Appropriate Grade
Choose between SS 304 and SS 202 based on the service environment, exposure to moisture or mild chemicals, and budget. Contact the Accurate Fastners sales team if the environment presents doubt about grade suitability.
Confirm Flange Face Type
DIN 6923 covers both smooth and serrated flange variants. Confirm which underside profile the application requires before placing an order, as this affects the nut's resistance to loosening under dynamic loads.
Quantity and Documentation Requirements
For bulk orders, provide the required quantity per size and grade. If material test certificates or batch documentation are required by your quality system, communicate this at the enquiry stage so Accurate Fastners can advise availability.
FAQs
Frequently asked questions
What standard does this nut conform to?
These nuts are manufactured to DIN 6923, the German standard defining the dimensional requirements for hexagon nuts with an integrated flange. DIN standards are widely recognised in industrial procurement across export markets and domestically in India.
Which stainless steel grades are available for this nut?
Accurate Fastners supplies DIN 6923 flange nuts in SS 304 and SS 202. If your project requires a different grade, the sales team can discuss alternatives and advise on feasibility and lead times for your specific requirement.
What size range is offered?
The DIN 6923 flange nut is available from M5 to M12 in the stainless steel grades listed. For sizes outside this range, please contact the sales team directly to discuss whether your requirement can be accommodated.
Do I still need a separate washer when using a DIN 6923 flange nut?
The integral flange provides a built-in bearing surface, so a separate flat washer is often not required. However, whether one is needed depends on the specific joint design and substrate material, which should be assessed for each application.
Which industries does Accurate Fastners typically supply these nuts to?
Accurate Fastners serves sectors including solar energy, RO water purification, LED lighting, food and beverage processing, pharmaceutical machinery, and submersible pump manufacturing, among others, both locally and for international customers.
How can I request a quotation for DIN 6923 flange nuts?
Submit your size, grade, quantity, and any documentation requirements via the website enquiry form, or contact the team directly at export@accuratefastners.com or through WhatsApp. The sales team will respond with pricing and availability details.
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