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Titanium Socket Countersunk Screws (DIN 7991)

Titanium Socket Countersunk Screws, to DIN 7991 standard, are driven using a hex wrench or insert bit, making them more efficient and offering higher resistance to cam out, faster use and higher achievable torque.

Featuring a hexagonal recess, titanium socket countersunk screws are often used in applications that require the fastener to be less visible whilst remaining aesthetically pleasing. When fully installed, the screw sits flush in the target housing.

With a number of variants available, such as vented socket countersunk screws and captive socket countersunk screws, these are various applications that they can be used within.

They are designed to be used in pre-drilled countersunk recesses.

Available at Fastenright in Grade 2 Titanium in thread sizes M4 to M8, with Grade 5 Titanium also available in thread sizes M2 to M36.

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.
Aluminium Socket Countersunk Screw

Technical Data & Availability
Thread Diameter (d1) d2 (mm) k max. (mm) S min. (mm) t (mm) Pitch (mm) Available Lengths (L)
4.0 1.2 1.27 CALL 0.40 From 3mm
M2.5 5.0 1.45 1.5 CALL 0.45 From 3mm
M3 6.0 1.7 2.0 1.2 0.50 From 4mm
M3.5 7.0 CALL CALL CALL CALL From 5mm
M4 8.0 2.3 2.5 1.8 0.70 From 4mm
M5 10.0 2.8 3.0 2.3 0.80 From 6mm
M6 12.0 3.3 4.0 2.5 1.00 From 8mm
M8 16.0 4.4 5.0 3.5 1.25 From 10mm
M10 20.0 5.5 6.0 CALL 1.50 From 12mm
M12 24.0 6.5 8.0 CALL 1.75 From 16mm
M14 27.0 7.0 10.0 CALL 2.00 From 25mm
M16 30.0 7.5 10.0 CALL 2.00 From 20mm
M18 33.0 8.0 10.0 CALL 2.50 From 40mm
M20 36.0 8.5 12.0 CALL 2.50 From 30mm
M22 36.0 13.1 14.0 CALL 2.50 From 40mm
M24 39.0 14.0 14.0 CALL 3.00 From 30mm
Size not listed? Please make an enquiry – we may be able to provide it.
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