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FULLERKREG DIN 6923 non-serrated hexagon flange nuts are manufactured from SUS304 austenitic stainless steel to Grade A2-70, conforming to the DIN 6923 standard. The smooth (non-serrated) flange bearing surface distributes clamping load over a wider area without marking or damaging the mating surface — making these nuts the preferred choice for applications where surface protection, soft substrates, or re-usability are required. Surface treatment: acid-washed (洗白) + passivation. Thread: metric coarse (ISO 68-1). RoHS compliant.
| Thread (d) | Pitch (mm) | s — Width Across Flats (mm) | e — Width Across Corners (mm) | m — Nut Height (mm) | dc — Flange Dia. (mm) | c — Flange Thickness (mm) | Unit Weight (g) |
|---|---|---|---|---|---|---|---|
| M5 | 0.8 | 8 | 8.79 | 5.0 | 11.8 | 1.0 | 1.5 |
| M6 | 1.0 | 10 | 11.05 | 6.0 | 14.2 | 1.1 | 2.9 |
| M8 | 1.25 | 13 | 14.38 | 8.0 | 17.9 | 1.2 | 6.1 |
| M10 | 1.5 | 15 | 16.64 | 10.0 | 21.8 | 1.5 | 10.6 |
| M12 | 1.75 | 18 | 20.03 | 12.0 | 26.0 | 1.8 | 18.2 |
| M14 | 2.0 | 21 | 23.36 | 14.0 | 29.9 | 2.0 | 27.8 |
| M16 | 2.0 | 24 | 26.75 | 16.0 | 34.5 | 2.0 | 40.4 |
| M20 | 2.5 | 30 | 33.53 | 20.0 | 42.9 | 2.5 | 76.8 |
| M24 | 3.0 | 36 | 39.98 | 24.0 | 50.9 | 3.0 | 138.0 |
All dimensions in mm. Unit weight is approximate (calculated at stainless steel density 7.93 g/cm³); actual weight may vary slightly by batch. Tolerances per DIN 6923 / ISO 4161. Dimensions are identical to the serrated variant; only the flange bearing surface differs.
| Parameter | Value |
|---|---|
| Standard | DIN 6923 / ISO 4161 |
| Type | Non-Serrated Hexagon Flange Nut |
| Material | SUS304 Stainless Steel (A2) |
| Strength Grade | A2-70 |
| Surface Treatment | Acid-Washed (洗白) + Passivation |
| Flange Face | Smooth / Non-Serrated (surface-friendly) |
| Thread Type | Metric Coarse Thread (ISO 68-1) |
| Size Range | M5 – M24 |
| RoHS Compliant | Yes |
| Brand | FULLERKREG |
| Property | Value |
|---|---|
| Material Grade | A2 (SUS304 / 1.4301) |
| Proof Load Stress | 580 MPa |
| Tensile Strength (min.) | 700 MPa |
| Yield Strength (min.) | 450 MPa |
| Hardness | ≤ HV 220 |
| Corrosion Resistance | Excellent (atmospheric, mild chemical) |
| Magnetic | Slightly magnetic after cold working |
| Operating Temperature | -196°C to +300°C |
| Element | C | Si | Mn | P | S | Cr | Ni |
|---|---|---|---|---|---|---|---|
| Content (%) | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 18.0–20.0 | 8.0–10.5 |
| Property | Non-Serrated (Plain Flange) ✔ | Serrated Flange |
|---|---|---|
| Flange Bearing Surface | Smooth / plain | Toothed / serrated |
| Mating Surface Protection | ✔ No marking or damage | ⚠ Teeth bite into surface |
| Re-usability | ✔ Fully re-usable | ⚠ Limited (teeth wear) |
| Soft / coated substrates | ✔ Suitable (aluminium, plastics, painted) | ✖ May damage surface |
| Vibration resistance | Standard (use with washer if needed) | ✔ Enhanced (built-in locking) |
| Load distribution | ✔ Wide, even bearing area | ✔ Wide bearing area |
| Typical application | Precision, aesthetics, re-assembly | Vibration-prone joints |
| Requirement | Recommended Spec |
|---|---|
| Mating surface must not be marked or scratched | Non-Serrated A2 ✔ |
| Aluminium, plastic, or painted substrate | Non-Serrated A2 ✔ |
| Frequent disassembly / re-use required | Non-Serrated A2 ✔ |
| Standard corrosion resistance (indoor/outdoor) | SUS304 A2-70 ✔ |
| Wide load-bearing surface needed | Flange design distributes load ✔ |
| Vibration-prone joint (locking without washer) | Consider Serrated A2 instead |
| Marine / food / chemical environment | Consider Non-Serrated A4 (SUS316) instead |
| High-temperature application (>300°C) | Consult FULLERKREG engineering |
DIN 6923 specifies hexagon flange nuts in both serrated and non-serrated (plain) variants. The non-serrated variant features a smooth flange bearing surface that spreads the clamping load without damaging the mating surface — making it suitable for soft materials, coated surfaces, and applications requiring repeated assembly. This standard is harmonized with ISO 4161. FULLERKREG manufactures to the current edition of DIN 6923 with full dimensional traceability.
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🏭 Direct Manufacturer — No middlemen. Factory-direct pricing with full production traceability.
📐 DIN / ISO Precision — Every batch produced and inspected to DIN 6923 / ISO 4161 dimensional standards.
🔩 Wide Size Range — M5 through M24 in stock; non-standard sizes available on request.
📦 Flexible MOQ & Packaging — Bulk bags, small boxes, or custom retail packaging to your specification.
🌍 Global Shipping — Direct export from China; experienced with Amazon FBA inbound, sea freight, and air freight.
✅ RoHS & Material Certs — Mill certificates, RoHS declarations, and inspection reports available on request.
🤝 OEM / Private Label — Custom marking, packaging, and labeling for wholesale partners.
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