Cross Recessed Round Head Self-drilling and Tapping Screws
The screw with a cross grooved round head design integrates drilling and tapping functions for efficient tightening without pre-drilling.
Product Technical Parameters
| ●Material: Carbon Steel and Stainless Steel |
| ●Surface Treatment: Galvanized, Nickel Plated, Black Oxide |
| ●Metric Strength Grades: 4.8, 8.8 |
| ●Metric Thread Diameter: ST2.9~ ST6.3 |
| ●Metric Thread Length: 13 ~ 50 |
Product Description of Cross Recessed Round Head Self-drilling and Tapping Screws
- Functions and uses: Screws with self-drilling tips and self-tapping threads can drill and tighten directly on materials such as metal plates, thus simplifying the installation process.
- Application: It is widely used in construction, metal processing and electrical installation fields, especially for scenarios requiring stable and non-countersunk screws.
- Needs Solved: eliminate the pre-drilling step, effectively save time and labor costs, simplify the installation process, and ensure that the fasteners have a stable and reliable connection effect.
Wanhong Fasteners supply high quality cross recessed round head self-drilling and tapping screws in a wide range of sizes and materials, designed to meet the diverse needs of various industrial sectors.
Data Sheet of Cross Recessed Round Head Self-drilling and Tapping Screws
Cross recessed round head self-drilling and tapping screws Dimensions Chart: Based on ISO 15481
| (mm) | ST2.9 | ST3.5 | ST4.2 | ST4.8 | ST5.5 | ST6.3 |
| P | 1.1 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 |
| a max | 1.1 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 |
| da max | 3.5 | 4.1 | 4.9 | 5.6 | 6.3 | 7.3 |
| dk max | 5.6 | 7 | 8 | 9.5 | 11 | 12 |
| dk min | 5.3 | 6.64 | 7.64 | 9.14 | 10.57 | 11.57 |
| k max | 2.4 | 2.6 | 3.1 | 3.7 | 4 | 4.6 |
| k min | 2.15 | 2.35 | 2.8 | 3.4 | 3.7 | 4.3 |
| r min | 0.1 | 0.1 | 0.2 | 0.2 | 0.25 | 0.25 |
| No. | 1 | 2 | 2 | 2 | 3 | 3 |
| M | 3 | 3.9 | 4.4 | 4.9 | 6.4 | 6.9 |
| t max | 1.8 | 1.9 | 2.4 | 2.9 | 3.1 | 3.6 |
| t min | 1.4 | 1.4 | 1.9 | 2.4 | 2.6 | 3.1 |
| Drilling plate thickness min | 0.7 | 0.7 | 1.75 | 1.75 | 1.75 | 2 |
| Drilling plate thickness max | 1.9 | 2.25 | 3 | 4.4 | 5.25 | 6 |
| z min | 6.25 | 6.8 | 8.7 | 9.3 | 11 | 12 |
Equivalent Standards: GB /T 15856.1 | DIN EN ISO 15481 | DIN 7504
Some of the standards listed above may be considered approximately equivalent. If there are differences in dimensions, please adhere to the original standard
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