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DIN 6921 Hex Flange Bolt

DIN 6921 Hexagon Flange Bolts

FULLERKREG supplies DIN 6921 hexagon flange bolts across all major material grades and surface treatments. The integrated flange beneath the hex head acts as a built-in washer — distributing clamping load over a wider bearing area, preventing surface damage, and eliminating the need for a separate washer. Available in plain and serrated flange variants. Select your material and grade below:

Available Series

Hex Flange Bolts (DIN 6921) — Stainless Steel A2 | Plain & Serrated Flange
Material: A2 / SUS304  |  Surface: Whitened & Passivated  |  Flange: Plain & Serrated  |  Size: M5–M16
Hex Flange Bolts (DIN 6921) — Marine Stainless Steel A4
Material: A4 / SUS316  |  Surface: Whitened & Passivated  |  Size: M5–M16
Hex Flange Bolts (DIN 6921) — Grade 8.8 Zinc Plated
Material: Carbon Steel  |  Surface: Zinc Plated  |  Strength: 800 MPa  |  Size: M5–M20
Hex Flange Bolts (DIN 6921) — Grade 10.9 Zinc Yellow
Material: Alloy Steel  |  Surface: Zinc Yellow (Dichromate)  |  Strength: 1040 MPa  |  Size: M5–M20

Product Gallery

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About DIN 6921 Hex Flange Bolts

  • Standard: DIN 6921 (Germany) ≡ ISO 1665 (International)
  • Head: Hexagon head with integrated circular flange (built-in washer)
  • Flange Types: Plain flange (smooth) / Serrated flange (anti-loosening teeth)
  • Thread: Metric coarse per ISO 261 / DIN 13
  • Size Range: M5 – M20 (grade-dependent)
  • Key Advantage: Integrated flange eliminates separate washer — wider bearing area, faster assembly
  • Serrated Flange: Teeth bite into mating surface for vibration resistance — ideal for automotive and machinery

Can’t find the grade or size you need? Contact FULLERKREG — additional grades and sizes available on request.

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