Product Introduction
Yellow galvanized self-tapping screws are threaded fasteners that can tap their own threads into pre-drilled holes in metal or non-metal materials, with a yellow zinc coating. Typically made of carbon steel, they feature high tensile strength and are commonly used in unibody, single-sided applications like securing doors, windows, and sheet metal.
Product Advantages
High-Strength Material Ensures Durability
Self Tapping Screws Yellow Galvanized are crafted from premium carbon steel and undergo a special heat treatment process, achieving a hardness of HRC 45-50, significantly higher than the HRC 30-35 of ordinary screws. This high-hardness material makes the screws resistant to deformation or fracture under high torque, especially suitable for scenarios requiring frequent disassembly. Additionally, the ductility of carbon steel ensures that the screws do not fail due to fatigue during long-term use, extending their lifespan by approximately 30% compared to ordinary screws.
Yellow Zinc Plating Enhances Corrosion Resistance
The screw surfaces are treated with yellow zinc plating, with a zinc layer thickness of 8-12 microns, far exceeding the 5-7 microns of ordinary zinc-plated screws. The zinc layer offers exceptional rust resistance and forms a dense oxide film on the surface, further isolating moisture and oxygen. This corrosion resistance makes the screws ideal for use in damp or high-salinity environments, such as coastal areas or outdoor buildings.
Self-Tapping Design Boosts Installation Efficiency
The thread design of Self Tapping Screws Yellow Galvanized has been optimized with a pitch of 1.5mm, denser than the 1.8mm of ordinary screws, enabling a stronger bite into materials. Meanwhile, the screw tips feature a special cutting design that allows them to cut directly into metal or wood without pre-drilling, increasing installation efficiency by about 40%. This design not only reduces construction time but also lowers the failure rate due to drilling errors.
Precise Dimensions Ensure Compatibility
The screw dimensions have been precisely calculated, with an outer diameter of 3.2-3.55mm, an inner diameter of 1.75-2.15mm, and a head diameter of 6.64-7.05mm. This design allows them to fit various standard hole sizes. Furthermore, the head length is 2.0mm, ensuring that the screws remain flush with the surface after tightening, preventing protruding parts from interfering with subsequent construction.
Wide Slot Design Improves Driving Stability
The screw's driving slot has a depth of 1.76-2.16mm and a width of 4.0mm. This wide slot design better matches the bits of electric or manual screwdrivers, reducing slippage. This stability not only enhances construction efficiency but also lowers tool wear rates.
Product Details
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Place of Origin: |
HEBEI, China (Mainland) |
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Brand Name: |
HNF |
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Certification: |
ISO9001 |
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Model Number: |
DIN7505 |
Specification
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Product Dimensions |
3.5x50mm |
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Head Diameter |
6.64-7.05mm |
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Head Length |
2.0mm |
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Outter Diameter |
3.2-3.55mm |
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Inner Diameter |
1.75-2.15mm |
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Head Radius |
1.8mm |
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Drive Deepness |
1.76-2.16mm |
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Drive Width |
4.0mm |
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Free Sample |
Available, only shipping need to be charged |
Payment & Shipping Terms
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Minimum Order Quantity: |
500000 pcs |
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Price: |
Negotiation |
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Packaging Details: |
Box and Carton and Paller or Customize Packing |
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Delivery Time: |
15-25days |
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Payment Terms: |
L/C, T/T, DP |
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Supply Ability: |
600 ton per month |
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Product Name: |
SELF TAPPING SCREWS YELLOW GALVANIZED |
Finish: |
Zinc Plated |
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Material: |
C1018-C1022 |
Grade: |
Gr.4.8 |
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Thread: |
Wood Thread |
Surface Hardness: |
450hv |
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Length: |
50mm |
Drive: |
Pozi Drive |
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Standard: |
DIN7505 |
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High Light: |
Self Tapping Screws Screwnuts and bolts |
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Why Choose Us
High Quality
Our products are manufactured to the highest standards, utilizing premium materials and advanced manufacturing processes to ensure exceptional quality.
Rich Experience
With a commitment to strict quality control and attentive customer service, our experienced team is always ready to address your needs and guarantee complete customer satisfaction.
Quality Control
Our professional staff meticulously monitors the production process, conducts thorough product inspections, and ensures that every final product meets the required quality standards, guidelines, and specifications.
24-Hour Online Service
We strive to respond to all inquiries within 24 hours, and our dedicated teams are always available to assist you in case of any emergencies.
FAQs
Q: What materials can Self Tapping Screws Yellow Galvanized be used in?
A: Self Tapping Screws Yellow Galvanized are versatile and can be used in a variety of materials including wood, metal, plastic, and some composites. They are particularly effective for applications requiring strong connections between these different types of materials.
Q: How do I choose the right size of Self Tapping Screws Yellow Galvanized for my project?
A: To choose the right size, consider the thickness of the materials you are joining and the load they will bear. It's important to select a screw length that will fully penetrate the materials without protruding too much on the other side, and a diameter that provides sufficient strength without splitting the material.
Q: Can Self Tapping Screws Yellow Galvanized be removed after being installed?
A: Yes, Self Tapping Screws Yellow Galvanized can be removed if necessary. However, it may require some effort as they are designed to tap their own threads into the material, which can make them more secure than pre-tapped screws. Using the appropriate tools and techniques can help minimize damage during removal.
Q: Are there any special tools required to install Self Tapping Screws Yellow Galvanized?
A: While ordinary screwdrivers or wrenches can be used, a power drill with the appropriate bit is often recommended for easier and more efficient installation. This helps to ensure that the screw is driven in straight and with the correct amount of torque.
Q: Does the yellow galvanized coating affect the performance of the screws?
A: The yellow galvanized coating is actually beneficial as it provides corrosion resistance, which extends the lifespan of the screws in outdoor or humid environments. It does not negatively impact the mechanical properties of the screws, ensuring they maintain their strength and self-tapping capabilities.
Q: How do I prevent the heads of Self Tapping Screws Yellow Galvanized from stripping during installation?
A: To prevent stripping, use the correct screwdriver or bit that matches the screw head type and size. Apply steady, even pressure while driving the screw to avoid over-tightening, which can cause the head to strip. If possible, use a torque-limiting tool to ensure the correct amount of force is applied.
Q: What are some common signs that indicate a Self Tapping Screw Yellow Galvanized has been over-tightened?
A: Common signs include a stripped screw head, a flattened or deformed head, or visible damage to the threads. Additionally, if the material around the screw shows signs of cracking or splitting, it may have been over-tightened.
Q: How should Self Tapping Screws Yellow Galvanized be stored to maintain their quality?
A: Store them in a cool, dry place away from direct sunlight and moisture. Keep them in their original packaging or in a sealed container to prevent exposure to air and humidity, which could lead to rusting or other forms of degradation.
Q: Can I paint over Self Tapping Screws Yellow Galvanized after installation?
A: It is generally not recommended to paint over the screws as the paint may not adhere well to the galvanized surface and could chip or peel over time. However, if painting is necessary for aesthetic or protective reasons, it's important to use a paint that is compatible with galvanized surfaces and to properly prepare the area before applying the paint.
Q: What safety precautions should I take when working with Self Tapping Screws Yellow Galvanized?
A: Always wear appropriate personal protective equipment such as safety glasses and gloves to protect against flying debris and sharp edges. Ensure the work area is stable and well-lit. Use tools that are in good condition and suitable for the task at hand to avoid accidents and injuries.
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