Dongshuo
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| Thread specifications (d) | ST2.2 | ST2.9 | ST3.5 | ST4.2 | ST4.8 | ST5.5 | ST6.3 | ||
|---|---|---|---|---|---|---|---|---|---|
| P | Pitch | 0.8 | 1.1 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 | |
| a | Max | 0.8 | 1.1 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 | |
| dk | Max | 3.7 | 5.3 | 6.64 | 7.64 | 9.14 | 10.57 | 11.57 | |
| Min | 3.4 | 5 | 6.28 | 7.28 | 8.78 | 10.14 | 11.14 | ||
| k | Max | 1.6 | 2.4 | 2.6 | 3.1 | 3.7 | 4 | 4.6 | |
| Min | 1.4 | 2.15 | 2.35 | 2.8 | 3.4 | 3.7 | 4.3 | ||
| dc (h15) | Max | 5 | 7 | 8 | 9 | 10 | 12.5 | 14 | |
| Min | 4.52 | 6.42 | 7.42 | 8.42 | 9.42 | 11.8 | 13.3 | ||
| s | Min | 0.3 | 0.5 | 0.8 | 0.8 | 0.8 | 1 | 1 | |
| y | C type | 2 | 2.6 | 3.2 | 3.7 | 4.3 | 5 | 6 | |
| F, FT type | 1.6 | 2.1 | 2.5 | 2.8 | 3.2 | 3.6 | 3.6 | ||
| Slot Number | 0 | 1 | 2 | 2 | 2 | 3 | 3 | ||
| M | Ref | 1 | 3 | 3.9 | 4.4 | 4.9 | 6.4 | 6.9 | |
| Insert depth / maximum | 0.85 | 1.4 | 1.4 | 1.9 | 2.4 | 2.6 | 3.1 | ||
| Insert depth / minimum | 1.2 | 1.8 | 1.9 | 2.4 | 2.9 | 3.1 | 3.6 | ||
Made of high-strength materials, these screws effectively tighten components and maintain equipment stability.
Special head design allows easy disassembly using a screwdriver, saving the step of pre-punching.
High-quality black galvanized oxide film provides excellent rust protection for harsh environments.
Composed of head, shaft, and threaded parts, making them highly efficient to manufacture and use.
Suitable for mechanical equipment, building, furniture, electronic products, and aerospace fields.
The flat cross-shaped head offers superior load-bearing capacity and tensile resistance.
