DIN 6923 Serrated Flanged Hexagon Nuts — Marine Stainless Steel A4 (SUS316)

FULLERKREG DIN 6923 serrated hexagon flange nuts in Grade A4-70 are manufactured from SUS316 austenitic stainless steel, conforming to DIN 6923 / ISO 4161. The molybdenum-alloyed SUS316 composition delivers superior resistance to chloride-induced pitting and crevice corrosion, making these nuts the preferred choice for marine, coastal, chemical, and food-processing environments. The integrated serrated flange bearing surface distributes clamping load and provides built-in vibration resistance — no separate lock washer required. Surface treatment: acid-washed (洗白) + passivation. Thread: metric coarse (ISO 68-1). RoHS compliant.

Dimensional Data — DIN 6923 Serrated Flange Nut (Marine Stainless Steel A4)

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.

Product Specifications

Material & Mechanical Properties — SUS316 (A4-70)

Chemical Composition — SUS316 (A4)

The addition of 2–3% Molybdenum (Mo) is the key differentiator of A4 / SUS316 over A2 / SUS304, providing significantly enhanced resistance to pitting and crevice corrosion in chloride-rich environments.

A4 vs A2 — When to Choose Marine Grade

Selection Guide — DIN 6923 Serrated Flange Nut (A4)

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. This standard is harmonized with ISO 4161. FULLERKREG manufactures to the current edition of DIN 6923 with full dimensional traceability and material certification.

Product Gallery

Why FULLERKREG

🏭 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.