DIN7981 Self Tapping Screw Phillips Drive Coarse Thread Type C
| Trademark | YB |
| Thread Coverage | Full Thread |
| Drive Style | Phillips |
| Self-Drilling | Yes |
| Thread | Coarse/Fine Thread |
| Common Slot Type | Slotted/Posidriv/Trox |
| Application | General Industry, Heavy Industry, Mining |
| Point Type | Type C |
DIN7981 screws are self-tapping screws with a pan head design and cross slots that adhere to German standards. They are commonly used for fastening thin metal plates or non-metallic materials. The head type features a semi-circular disc head, with groove options like H-shaped or Z-shaped cross grooves. These screws come with a choice of pointed tail (C-type) or flat tail (F-type), allowing selection based on application requirements.
- Manufactured to strict DIN standards for thread clarity and dimensional accuracy
- Precision-engineered tail tooth lifting for optimal performance
- Rigorous quality control ensures proper head axis alignment
- Cross groove plug gauge testing prevents slipping and ensures batch consistency
| Screw Threadd | ST2.2 | ST2.9 | ST3.5 | (ST3.9) | ST4.2 | ST4.8 | ST5.5 | ST6.3 |
|---|---|---|---|---|---|---|---|---|
| P (Pitch) | 0.8 | 1.1 | 1.3 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 |
| a (max) | 0.8 | 1.1 | 1.3 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 |
| dk (max=nominal size) | 4.2 | 5.6 | 6.9 | 7.5 | 8.2 | 9.5 | 10.8 | 12.5 |
| dk (min) | 3.9 | 5.3 | 6.54 | 7.14 | 7.84 | 9.14 | 10.37 | 12.07 |
| k (max=nominal size) | 1.8 | 2.2 | 2.6 | 2.8 | 3.05 | 3.55 | 3.95 | 4.55 |
| k (min) | 1.55 | 1.95 | 2.35 | 2.55 | 2.75 | 3.25 | 3.65 | 4.25 |
| y (max) Type C | 2 | 2.6 | 3.2 | 3.5 | 3.7 | 4.3 | 5 | 6 |
| y (max) Type F | 1.6 | 2.1 | 2.5 | 2.7 | 2.8 | 3.2 | 3.6 | 3.6 |
| Socket No. | 1 | 1 | 2 | 2 | 2 | 2 | 3 | 3 |
| M1 (≈) | 2.6 | 3 | 4.2 | 4.4 | 4.6 | 5 | 6.5 | 7.1 |
| M2 (≈) | 2.4 | 2.9 | 3.9 | 4.1 | 4.3 | 4.7 | 6.2 | 6.7 |
DIN7981 self-tapping screws are widely used in electronic appliances, building curtain walls, medical equipment, and packaging machinery. Their self-tapping design eliminates the need for pre-tapped threaded holes, simplifying installation. These screws comply with international standards including ISO 7049 and DIN7981, and align with Chinese standard GB/T 845.
Note: While convenient for many applications, these screws have limited load-bearing capacity and are not recommended for high-load situations.
Bolts are packed in neutral packaging boxes with standard quantities arranged in small cartons. The exact number of units per carton can be customized to meet specific customer requirements.
Small cartons are consolidated into larger master cartons for secure transportation and storage. Quantity per master carton can be customized based on client specifications.
Pallets are securely wrapped with waterproof film and reinforced with packaging straps. Custom shipping marks or labels ensure clear identification and compliance with logistics requirements, providing weather-resistant protection during transportation.
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