Home >
Hot Products >
High-Quality Cross Flange Self Tapping Screws - China Suppliers & Factory with Competitive Pricing and High Supply Capacity Manufacturer, Factories
1 / 3
High-Quality Cross Flange Self Tapping Screws - China Suppliers & Factory with Competitive Pricing and High Supply Capacity Manufacturer, Factories
EXW PRICE: As Requested Minimum Order Quantity: 2 Tons Packaging: Bag/Box with Pallet Ports: Tianjin/Qingdao/Shanghai/Ningbo Delivery Time: 5-30 Days Depending on Quantity Payment Options: T/T/LC Supply Capacity: 500 Tons Per Month Discover the quality and reliability of our products sourced from top suppliers in China. Our factory is equipped to meet your needs with efficient production and packaging solutions, ensuring timely delivery to major ports such as Tianjin, Qingdao, Shanghai, and Ningbo.
Carbon Steel: Low cost, high strength; surface requires rust prevention treatment such as galvanizing and Dacromet.
Stainless Steel (304/316): Strong corrosion resistance, suitable for humid or chemical environments.
Aluminum Alloy / Copper: Lightweight or conductive demand scenarios, but with lower strength.
Surface Treatment
Galvanization: Divided into electroplating (blue and white zinc, color zinc) and hot-dip galvanizing; generally rust resistant, suitable for indoor environments.
Dacromet (Zinc Chromium Coating): No risk of hydrogen embrittlement, high temperature resistance, corrosion resistance; used in automobiles and outdoors.
Phosphating: Increases lubricity and reduces installation friction.
Nylon Coating: Insulation, anti-loosening; commonly used in electronic devices.
Application Fields
Automotive Manufacturing: Sheet metal parts, interior panels, and wiring harness fixation — must be shock resistant and anti-loose.
Electronic Appliances: Circuit board and shell assembly; mainly small size (M2–M4) to avoid conductive interference.
Architectural Decoration: Installation of color steel plates, aluminum alloy doors and windows, and protection of flange surfaces from scratches.
Mechanical Equipment: Panels and enclosures fixed to withstand vibration environments.
Specifications and Standards
Common Specifications
Nominal Diameter: M2 to M12 (commonly M4–M6).
Length Range: 6mm to 100mm, depending on application requirements.
Flange Diameter: Usually 2–3 times the diameter of the screw (e.g., M5 flange surface diameter of approximately 10–15mm).
International Standards
National Standard: GB/T 15856.4 — Pan head cross flange self-tapping screws.
German Standard: DIN 7500 — Technical standard for self-tapping screws.
American Standards: ANSI/ASME B18.6.4, SAE J78 — Automotive applications.
Frequently Asked Questions
QWhat is the difference between electroplated galvanizing and hot-dip galvanizing on flange screws?
Electroplated galvanizing provides a thinner, more decorative coating suitable for indoor use. Hot-dip galvanizing applies a much thicker zinc layer, offering superior corrosion resistance for outdoor or heavy-duty applications.
QWhich material is best for flange self-tapping screws used in humid environments?
Stainless steel grades 304 or 316 are recommended for humid or chemically aggressive environments due to their strong corrosion resistance and long-term durability.
QWhat size flange self-tapping screws are most commonly used in automotive manufacturing?
In automotive manufacturing, M4 to M6 flange self-tapping screws are most commonly used for sheet metal parts and interior panels, as they provide high vibration resistance.
QWhat international standards do these flange self-tapping screws comply with?
Our screws comply with multiple international standards including GB/T 15856.4, German DIN 7500, and American standards ANSI/ASME B18.6.4 and SAE J78.
QWhy is Dacromet coating preferred for outdoor applications?
Dacromet (zinc chromium coating) eliminates the risk of hydrogen embrittlement, withstands high temperatures, and provides excellent corrosion resistance, making it ideal for outdoor and automotive use.
QWhat is the minimum order quantity (MOQ) and supply capacity?
The minimum order quantity is 100 pieces per order. The monthly supply capacity is up to 10,000 pieces, ensuring reliable delivery for various project scales.
Dongshuo
