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High-Quality Hexagonal Self-Drilling Screws from China Factory – High Torque Fasteners Suppliers for Metal Applications Manufacturers, Factory
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High-Quality Hexagonal Self-Drilling Screws from China Factory – High Torque Fasteners Suppliers for Metal Applications Manufacturers, Factory
Hexagonal self-drilling screws are innovative fasteners specifically designed for applications that demand higher torque and robust fixation. These screws, featuring hexagonal nuts, are ideal for projects requiring superior fastening and tensile strength compared to conventional screws. With their self-tapping function, hexagonal self-drilling screws can drill and tap directly into materials, eliminating the need for pre-drilling. Commonly used in fastening metal and thin plate materials, such as steel structures and metal components, these screws are essential in various industries. If you’re searching for high-quality hexagonal self-drilling screws, look no further than reliable suppliers and factories in China that meet your fastening needs.
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.
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 / Sheet metal
Min
0.7
0.7
1.75
1.75
1.75
2
Max
1.9
2.25
3
4.4
5.25
6
Key Applications & Functions
1Fixation of thin plate materials for simple buildings
2Building structure reinforcement and support
3Building decoration fixation
4Mechanical equipment fixation
5Automotive component assembly
6Installation in the construction industry
Frequently Asked Questions
QWhat are hexagonal self-drilling screws used for?
Hexagonal self-drilling screws are widely used in carpentry, metalworking, and construction work. They are ideal for fastening thin plate materials, reinforcing building structures, fixing decorative elements, securing mechanical equipment, assembling automotive components, and general construction industry installations.
QWhat thread specifications are available for these screws?
These screws are available in six standard thread specifications: ST2.9, ST3.5, ST4.2, ST4.8, ST5.5, and ST6.3, with pitches ranging from 1.1mm to 1.8mm to suit a variety of application requirements.
QWhy is a hexagonal head design preferred?
The hexagonal head design allows for easier tightening with torque tools such as wrenches. It provides better grip and is less likely to strip or break compared to other head designs, making it ideal for applications requiring firm fixation.
QWhat is the maximum drilling depth for these screws?
The maximum drilling depth varies by size: ST2.9 (1.9mm), ST3.5 (2.25mm), ST4.2 (3mm), ST4.8 (4.4mm), ST5.5 (5.25mm), and ST6.3 (6mm).
QAre color galvanized screws suitable for outdoor use?
Yes. The color galvanized coating provides essential corrosion resistance, making these screws suitable for both indoor and outdoor applications, including structures exposed to moisture.
QHow do I choose the right thread size for my project?
Selection depends on material thickness and load requirements. Refer to the specifications table above; key parameters like drilling depth range and wrench size (s) will guide you to the appropriate screw size.
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