Hot Products
0102030405
China Color Galvanized Hexagonal Self-Drilling Screws Supplier | High Torque Fasteners from Factory
Thread Specifications
| Thread specifications | ST2.9 | ST3.5 | ST4.2 | ST4.8 | ST5.5 | ST6.3 | |
| P | Pitch | 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 |
| dc | Max | 6.3 | 8.3 | 8.8 | 10.5 | 11 | 13.5 |
| Min | 5.8 | 7.6 | 8.1 | 9.8 | 10 | 12.2 | |
| c | Min | 0.4 | 0.6 | 0.8 | 0.9 | 1 | 1 |
| s | Maximum = nominal | 4 | 5.5 | 7 | 8 | 8 | 10 |
| Min | 3.82 | 5.32 | 6.78 | 7.78 | 7.78 | 9.78 | |
| e | Min | 4.28 | 5.96 | 7.59 | 8.71 | 8.71 | 10.95 |
| k | Maximum = nominal | 2.8 | 3.4 | 4.1 | 4.3 | 5.4 | 5.9 |
| Min | 2.5 | 3 | 3.6 | 3.8 | 4.8 | 5.3 | |
| kw | Min | 1.3 | 1.5 | 1.8 | 2.2 | 2.7 | 3.1 |
| r | Min | 0.1 | 0.1 | 0.2 | 0.2 | 0.25 | 0.25 |
| Drilling depth or sheet metal thickness | Min | 0.7 | 0.7 | 1.75 | 1.75 | 1.75 | 2 |
| Max | 1.9 | 2.25 | 3 | 4.4 | 5.25 | 6 | |
| LG (minimum) | - | - | - | - | - | ||
Hexagonal drill screws are commonly used in places where mechanical fixing is required, such as carpentry, metalworking, and construction work. Their hexagonal head design makes them easier to secure with torque tools, such as a wrench or torque wrench, and less likely to break than other head designs. This type of screw can be used where it is necessary to ensure a firm fixation and where frequent tightening and loosening is required.
Its Function
- 1 Fixation of Thin Plate Materials for Simple Buildings
- 2 Building structure reinforcement and support
- 3 Building Decoration Fixation
- 4 Mechanical equipment fixation
- 5 Automotive component assembly
- 6 Installation in the construction industry
Frequently Asked Questions
Q
What are color galvanized hexagonal self-drilling screws used for?
Color galvanized hexagonal self-drilling screws are widely used in carpentry, metalworking, construction, automotive assembly, and mechanical equipment fixation. Their self-drilling tip eliminates the need for pre-drilling, saving time and effort on the job site.
Q
What thread sizes are available for hexagonal self-drilling screws?
These screws are available in thread sizes ST2.9, ST3.5, ST4.2, ST4.8, ST5.5, and ST6.3, with pitches ranging from 1.1 mm to 1.8 mm to suit various application requirements.
Q
What is the advantage of a hexagonal head design on self-drilling screws?
The hexagonal head design allows for easy and secure tightening using a wrench or torque wrench. It provides better torque transfer, reduces the risk of stripping, and is less likely to break compared to other head designs, making it ideal for applications requiring firm and reliable fixation.
Q
What drilling depth or sheet metal thickness is compatible with these screws?
The compatible drilling depth or sheet metal thickness varies by thread size. For example, ST2.9 and ST3.5 support a minimum of 0.7 mm, while ST6.3 supports up to 6 mm maximum. Please refer to the thread specifications table for detailed values per size.
Q
Are these screws suitable for outdoor or weatherproof applications?
Yes. The color galvanized coating provides corrosion resistance, making these screws suitable for outdoor use and environments exposed to moisture, making them a reliable choice for building decoration, structural support, and construction industry installations.
Q
Can hexagonal self-drilling screws be tightened and loosened repeatedly?
Yes. One of the key benefits of hexagonal self-drilling screws is their suitability for applications that require frequent tightening and loosening. Their robust head design and thread structure maintain holding strength even after multiple installation and removal cycles.