Home » DIN 7991 / ISO 10642 Flat Head Countersunk Socket

DIN 7991 / ISO 10642 Flat Head Countersunk Socket

DIN 7991 / ISO 10642 Flat Head Countersunk Socket Screws

FULLERKREG supplies DIN 7991 / ISO 10642 flat head countersunk socket screws (Allen countersunk bolts) across all major material grades and surface treatments. The 90° countersunk head sits flush with or below the surface — ideal for applications requiring a smooth, snag-free finish. Select your series below:

Available Series

Flat Head Countersunk Socket Screws (DIN 7991) — Stainless Steel A2-70
Material: A2 / SUS304  |  Surface: Whitened & Passivated  |  Thread: Metric Coarse  |  Size: M3–M20
Flat Head Countersunk Socket Screws (DIN 7991) — Marine Stainless Steel A4-70
Material: A4 / SUS316  |  Surface: Whitened & Passivated  |  Thread: Metric Coarse  |  Size: M3–M20
Flat Head Countersunk Socket Screws (DIN 7991) — Grade 10.9 Black Oxide
Material: Alloy Steel  |  Surface: Black Oxide  |  Thread: Metric Coarse  |  Strength: 1040 MPa
Flat Head Countersunk Socket Screws (DIN 7991) — Grade 10.9 Bright Zinc CR3
Material: Alloy Steel  |  Surface: Zinc CR3 (RoHS)  |  Thread: Metric Coarse  |  Strength: 1040 MPa

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About DIN 7991 / ISO 10642

  • Standard: DIN 7991 ≡ ISO 10642
  • Head: 90° flat countersunk head with internal hexagon (Allen key) drive
  • Key Feature: Flush or sub-flush installation — smooth, snag-free surface finish
  • Thread: Metric coarse per ISO 261 / DIN 13
  • Size Range: M3 – M20 (grade-dependent)
  • Drive Tool: Hex key per ISO 2936 / DIN 911

Can’t find the grade or size you need? Contact FULLERKREG — additional grades including Grade 12.9 and A4-80 are available on request.

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