China Galvanized Countersunk Cross Tapping Screws from China Suppliers - Reliable Factory Quality for Secure Installations Supplier, Factory

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China Galvanized Countersunk Cross Tapping Screws from China Suppliers - Reliable Factory Quality for Secure Installations Supplier, Factory

When selecting self tapping screws for your projects, it's crucial to evaluate the usage environment to ensure the screws chosen are appropriate. As a trusted supplier and factory in China, we recommend using suitable electric or manual screwdrivers when installing these screws. Adhering strictly to the operational guidelines is essential for optimal performance.

Attention to drilling depth is vital; improper depth can lead to threads that are either too long or too short, compromising the effectiveness of the installation. Our self tapping screws are meticulously manufactured to meet the highest standards, ensuring that the material, size, and thread specifications are accurate. By choosing our products, you can guarantee a secure and robust installation every time.

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Product Description

Galvanized countersunk cross tapping screws

Thread specifications			ST2.2	ST2.9	ST3.5	ST4.2	ST4.8	ST5.5	ST6.3	ST8	ST9.5
P	Pitch		0.8	1.1	1.3	1.4	1.6	1.8	1.8	2.1	2.1
a	Max		1.6	2.2	2.6	2.8	3.2	3.6	3.6	4.2	4.2
d_k	Max		3.8	5.5	7.3	8.4	9.3	10.3	11.3	15.8	18.3
d_k	Min		3.5	5.2	6.9	8	8.9	9.9	10.9	15.4	17.8
k	Max		1.1	1.7	2.35	2.6	2.8	3	3.15	4.65	5.25
Slot Number			0	1	2	2	2	3	3	4	4
M₁	Cruciform		1.9	3.2	4.4	4.6	5.2	6.6	6.8	8.9	10
M₂	Zigzag slot		2	3	4.1	4.4	4.9	6.3	6.6	8.8	9.8
y	Reference value	Type C	2	2.6	3.2	3.7	4.3	5	6	7.5	8
		Type F	1.6	2.1	2.5	2.8	3.2	3.6	3.6	4.2	4.2
		Type R	/	/	2.7	3.2	3.6	4.3	5

How to Choose a Suitable Self Tapping Screw

Select by Material: Select different self tapping screws based on the material characteristics that need to be nailed in. For example, for hard materials, choose self tapping screws with high strength, appropriate length and diameter.

According to Thread Selection: Self tapping screws usually have two types: coarse thread and fine thread, and different threads are usually suitable for different materials.

Select According to the Shape of the Head: The pentagonal head self tapping screw is more sturdy than the ordinary round head self tapping screw, but the price is also relatively high.

Frequently Asked Questions

Q: What is the difference between coarse thread and fine thread self tapping screws?

Coarse thread self tapping screws are typically used for softer materials such as wood, plastic, and light sheet metal, offering faster installation. Fine thread self tapping screws provide stronger holding power and are better suited for harder or thinner metal materials.

Q: What are the common head types and when should each be used?

Common head types include flat (countersunk), pan head, hex head, and round head. Flat heads sit flush with the surface for a clean finish, while hex heads allow for high torque applications.

Q: What does the "ST" designation mean in specifications?

"ST" stands for "Sheet metal Tapping" screw. The number following it (e.g., ST4.2) indicates the screw's nominal outer thread diameter in millimeters, following ISO and DIN standards.

Q: What is the purpose of galvanizing self tapping screws?

Galvanizing applies a protective zinc coating that significantly improves resistance to corrosion and rust, making them ideal for outdoor and humid environments.

Q: How do I determine the correct length and diameter?

The screw length should generally be 2.5 to 3 times the thickness of the material being fastened. The diameter should match the recommended pilot hole size for the specific material.

Q: What are Type C, Type F, and Type R point styles?

Type C has a blunt point for pre-drilled holes; Type F features a tapered point for self-piercing thin metal; Type R has a rounded point for softer materials and plastics to prevent splitting.

Product Detail

China Galvanized Countersunk Cross Tapping Screws from China Suppliers - Reliable Factory Quality for Secure Installations Supplier, Factory

Product Description

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Product Detail

China Galvanized Countersunk Cross Tapping Screws from China Suppliers - Reliable Factory Quality for Secure Installations Supplier, Factory

Product Description

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