DIN 7991 Hexagon socket countersunk head screws

Is DIN 7991 still current?

No, it has been replaced. DIN 7991 has been replaced by ISO 10642 (MechAtlas review: 27 October 2026). Use the replacement for new work, and check differences before interchanging parts.

What it covers

Former German socket countersunk screw standard.

Before you interchange parts

• DIN 7991 → ISO 10642 / EN ISO 10642 (stated by catalogue): Catalogue prints 'ISO 10462' — a typo for ISO 10642. Also offered as Torx-pin safety screw in A2.

Parts that use DIN 7991

• Countersunk head screw (Germany (DIN), old)
  Screw with a cone-shaped head that sits flush in a countersunk hole; socket or slotted drive.
  DIN 7991 - M8 x 25 - 10.9
  Withdrawn; replaced by DIN EN ISO 10642.

Official source

MechAtlas does not reproduce standards. Check the official edition at the publisher's page for DIN 7991 or the DIN store.

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