DIN 7991 Socket Countersunk Screws
We supply DIN 7991 socket countersunk screws in high tensile grade 10.9 self colour and A2/A4 stainless steel, from M2 to M24, plus grade 8.8. The countersunk head sits flush with the surface and takes a hex key, combining a clean finish with socket-screw strength for machine guards, jigs and finished assemblies.
Also known as: csk socket, socket csk, countersunk socket screw, socket countersunk, allen countersunk, csk cap screw.
DIN 7991 dimensions
| Diameter | Pitch | Head diameter | Head depth | Key size | Head angle |
|---|---|---|---|---|---|
| M3 | 0.5mm | 6.0mm | 1.7mm | 2.0mm | 90 |
| M4 | 0.7mm | 8.0mm | 2.3mm | 2.5mm | 90 |
| M5 | 0.8mm | 10.0mm | 2.8mm | 3.0mm | 90 |
| M6 | 1.0mm | 12.0mm | 3.3mm | 4.0mm | 90 |
| M8 | 1.25mm | 16.0mm | 4.4mm | 5.0mm | 90 |
| M10 | 1.5mm | 20.0mm | 5.5mm | 6.0mm | 90 |
| M12 | 1.75mm | 24.0mm | 6.5mm | 8.0mm | 90 |
| M14 | 2.0mm | 28.0mm | 7.0mm | 10mm | 90 |
| M16 | 2.0mm | 30.0mm | 7.5mm | 10mm | 90 |
| M20 | 2.5mm | 36.0mm | 8.5mm | 12mm | 90 |
| M24 | 3.0mm | 39mm | 14mm | 14mm | 60 |
Is DIN 7991 the same as ISO 10642?
DIN 7991 and ISO 10642 both cover hexagon socket countersunk head screws. The standards are closely related, although dimensional or technical differences may exist. If your drawing specifies either designation, send us the requirement and we can identify the appropriate product.
Is DIN 7991 available in stainless steel?
Yes - DIN 7991 socket countersunk screws are available in A2 and A4 stainless steel across a wide range of metric sizes, alongside high tensile grade 10.9 self colour.
What is the head angle of DIN 7991 countersunk screws?
90 degrees on standard sizes. Larger diameters differ - our M24 size has a 60-degree head, as shown in the dimension table. If the countersink angle matters for your application, confirm it when you enquire.
Need DIN 7991 in a non-standard size or material?
Send us your drawing — specials quoted within 24 hours.