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Socket Countersunk Screw DIN 7991

SKU: SK09 Categories: ,

Socket Countersunk Head Machine Screws are made to DIN standard 7991 and host a hexagonal recess. They can be driven using a hex wrench or insert bit.

The driving of this screw with a hex wrench or insert bit makes these screws more efficient than slotted screw products, as the hex socket drive has more resistance to cam-out, and can be used alongside power drivers, enabling faster installation and higher torque to be achieved.

Available from Fastenright in Steel grade 10.9, in A2 and A4 Stainless Steel, and in Brass, Aluminium or Titanium if required.

Socket Countersunk Screws to DIN 7991 are available from M2 to M36, with lengths ranging from 3mm onwards. Imperial and other threads (UNC, UNF, BSW and BSF) are also available.

Non-standard sizes, materials and finishes are available to order as specials, including small volume manufacture, modifications and bespoke parts made to drawings. Minimum order quantities apply.

Socket Csk Screws Din 7991

Technical Data & Availability
Diameter (d1)
d2 (mm) k max. (mm) S min. (mm) Pitch (mm) Available
Lengths (L)
4.0 1.2 1.27 0.40 From 3mm
M2.5 5.0 1.45 1.5 0.45 From 3mm
M3 6.0 1.7 2.0 0.50 From 4mm
M3.5 7.0 From 5mm
M4 8.0 2.3 2.5 0.70 From 4mm
M5 10.0 2.8 3.0 0.80 From 6mm
M6 12.0 3.3 4.0 1.00 From 8mm
M8 16.0 4.4 5.0 1.25 From 10mm
M10 20.0 5.5 6.0 1.50 From 12mm
M12 24.0 6.5 8.0 1.75 From 16mm
M14 27.0 7.0 10.0 2.00 From 25mm
M16 30.0 7.5 10.0 2.00 From 20mm
M18 33.0 8.0 10.0 2.50 From 40mm
M20 36.0 8.5 12.0 2.50 From 30mm
M22 36.0 13.1 14.0 2.50 From 40mm
M24 39.0 14.0 14.0 3.00 From 30mm
M27 3.00 Please Call
M30 3.50 From 50mm
M36 4.00 Please Call
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