DIN 7981 SCH (Star Cylinder Head) sheet metal screws are specialized fasteners used for assembling metal and other thin materials. Their star cylinder head design allows these screws to withstand high torque values and provides easy usability with various tools (e.g., star screwdrivers) during assembly. Manufactured in accordance with DIN 7981 standards, these screws are typically made from durable materials like steel or stainless steel, making them resistant to corrosion. Sheet metal screws are commonly preferred in applications requiring the joining of lightweight and thin materials. The star head structure ensures better grip on the screw head, reducing the risk of slipping during assembly. DIN 7981 SCH screws are widely used in the automotive, mechanical engineering, and construction sectors, providing reliable and robust connections that expedite assembly processes and deliver long-lasting performance.
| Boy/ Ø | ST2,2 | ST2,9 | ST3,5 | ST3,9 | ST4,2 | ST4,8 | ST5,5 | ST6,3 |
|---|---|---|---|---|---|---|---|---|
| dk | 4,2 | 5,6 | 6,9 | 7,5 | 8,2 | 9,5 | 10,8 | 12,5 |
| k min. | 1,55 | 1,95 | 2,35 | 2,55 | 2,75 | 3,25 | 3,65 | 4,25 |
| k max. | 1,80 | 2,20 | 2,60 | 2,80 | 3,05 | 3,55 | 3,95 | 4,55 |
| r max. | 0,3 | 0,4 | 0,5 | 0,5 | 0,6 | 0,7 | 0,8 | 0,9 |
| ✦ | P1 | P1 | P2 | P2 | P2 | P2 | P3 | P3 |