DIN 6923 Serrated Flanged Hexagon Nuts — Zinc Plated Steel (Class 8)

FULLERKREG DIN 6923 Class 8 serrated hexagon flange nuts are manufactured from medium carbon steel 35K, heat-treated to achieve Class 8 mechanical properties, conforming to DIN 6923. 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), providing reliable corrosion protection for general industrial applications. Thread: metric coarse (ISO 68-1). RoHS compliant.

Dimensional Data — DIN 6923 Serrated Flange Nut (Zinc Plated, Class 8)

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 — Medium Carbon Steel 35K (Class 8)

Chemical Composition — Medium Carbon Steel 35K

35K medium carbon steel is quenched and tempered to achieve Class 8 strength. The higher carbon content (vs. Q195 low carbon steel) enables significantly greater tensile and proof load performance.

Class 8 vs Class 4 — Strength Comparison

Surface Treatment — Bright Zinc Plated (Zn Cr3)

Selection Guide — DIN 6923 Serrated Flange Nut (Class 8, 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 8 nuts are manufactured from medium carbon steel and must be quenched and tempered per DIN EN ISO 898-2. Bright zinc plating per ISO 4042 with trivalent chromium (Cr3) passivation ensures RoHS compliance. FULLERKREG manufactures to the current edition of DIN 6923 with full dimensional traceability.

Product Gallery

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.