DIN 6923 Serrated Flanged Hexagon Nuts — Zinc Plated Alloy Steel (Class 10)

FULLERKREG DIN 6923 Class 10 serrated hexagon flange nuts are manufactured from boron alloy steel 10B21, quenched and tempered to achieve Class 10 mechanical properties, conforming to DIN 6923. The boron addition in 10B21 significantly enhances hardenability, enabling superior strength-to-weight performance over standard medium carbon steel. The integrated serrated flange bearing surface distributes clamping load over a wider area and provides built-in vibration resistance — eliminating the need for a separate lock washer. Surface finish: bright zinc plated with trivalent chromium passivation (Zn + Cr3), RoHS compliant. Thread: metric coarse (ISO 68-1).

Dimensional Data — DIN 6923 Serrated Flange Nut (Zinc Plated, Class 10)

All dimensions in mm. Unit weight is approximate (calculated at steel density 7.85 g/cm³); actual weight may vary slightly by batch. Tolerances per DIN 6923. Zinc plating adds approximately 5–25 µm per side; verify fit with mating components before ordering in bulk.

Product Specifications

Material & Mechanical Properties — Boron Alloy Steel 10B21 (Class 10)

Chemical Composition — Boron Alloy Steel 10B21

10B21 is a boron-microalloyed steel. The trace addition of boron (B) dramatically improves hardenability, allowing Class 10 strength to be achieved with lower carbon content than conventional medium carbon steels — reducing hydrogen embrittlement risk while maintaining superior mechanical performance.

Class 10 vs Class 8 vs Class 4 — Strength Comparison

Surface Treatment — Bright Zinc Plated (Zn Cr3)

Note: For high-strength fasteners (Class 10 and above), hydrogen embrittlement relief baking after electroplating is recommended per ISO 4042. FULLERKREG applies baking as standard for Class 10 zinc-plated products.

Selection Guide — DIN 6923 Serrated Flange Nut (Class 10, Zinc Plated)

Standard Reference

DIN 6923 specifies hexagon flange nuts with a serrated or plain bearing surface. The serrated variant provides mechanical locking through the teeth on the flange underside, which bite into the mating surface under torque — eliminating the need for a separate spring or toothed washer. Class 10 nuts are manufactured from alloy steel and must be quenched and tempered per DIN EN ISO 898-2. Bright zinc plating per ISO 4042 with trivalent chromium (Cr3) passivation and hydrogen embrittlement relief baking ensures both RoHS compliance and fastener integrity. FULLERKREG manufactures to the current edition of DIN 6923 with full dimensional traceability.

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Why FULLERKREG

🏭 Direct Manufacturer — No middlemen. Factory-direct pricing with full production traceability.
📐 DIN Precision — Every batch produced and inspected to DIN 6923 dimensional standards.
🔩 Wide Size Range — M5 through M20 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.