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Color Galvanized Hexagonal Self-Drilling Screws - High Torque Fasteners from China Suppliers and Factory
| 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
- Fixation of Thin Plate Materials for Simple Buildings
- Building Structure Reinforcement and Support
- Building Decoration Fixation
- Mechanical Equipment Fixation
- Automotive Component Assembly
- 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, and construction work. They are ideal for fixing thin plate materials, reinforcing building structures, decorating buildings, assembling mechanical equipment and automotive components, and general construction industry installations.
Q
What thread sizes are available for hexagonal self-drilling screws?
Hexagonal self-drilling screws are available in a range of thread specifications including ST2.9, ST3.5, ST4.2, ST4.8, ST5.5, and ST6.3, with pitches ranging from 1.1mm to 1.8mm depending on the size selected.
Q
Why is a hexagonal head design preferred over other head types?
The hexagonal head design allows for easier tightening and loosening using standard torque tools such as wrenches or torque wrenches. It also distributes torque more evenly, making it less likely to strip or break compared to other head designs, especially in high-torque applications.
Q
What is the drilling depth range for these screws?
The drilling depth or sheet metal thickness varies by screw size. For example, ST2.9 screws have a minimum drilling depth of 0.7mm and a maximum of 1.9mm, while ST6.3 screws support a minimum of 2mm and a maximum of 6mm, making them suitable for a wide range of material thicknesses.
Q
What does "color galvanized" mean for these screws?
"Color galvanized" refers to a surface treatment process where the screws are coated with a zinc-based layer and then further treated with a color coating. This enhances corrosion resistance, extends the service life of the screw, and also provides an aesthetic finish that can match different application environments.
Q
Can hexagonal self-drilling screws be reused after removal?
Yes, one of the key advantages of hexagonal self-drilling screws is their suitability for applications that require frequent tightening and loosening. However, it is generally recommended to inspect the screw threads for wear or damage before reuse to ensure a secure and reliable connection.