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Cross Flange Self Tapping Screws - China Suppliers & Factory with Competitive Pricing and High Supply Capacity
| FOB Price | US $0.5 – 9,999 / Piece |
| Min. Order Quantity | 100 Piece/Pieces |
| Supply Ability | 10,000 Piece/Pieces per Month |
Materials and Surface Treatment
Common Materials
- 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 (blue/white zinc or color zinc) 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 or chemical 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, interior panels, and wiring harness fixation, as they provide the right balance of strength and vibration resistance.
QWhat international standards do your flange self-tapping screws comply with?
Our flange self-tapping screws comply with multiple international standards including China's GB/T 15856.4, Germany's DIN 7500, and American standards ANSI/ASME B18.6.4 and SAE J78 for automotive applications.
QWhy is Dacromet coating preferred for outdoor and automotive applications?
Dacromet (zinc chromium coating) is preferred because it eliminates the risk of hydrogen embrittlement, withstands high temperatures, and provides excellent corrosion resistance — making it ideal for automotive components and outdoor environments.
QWhat is the minimum order quantity and what is the monthly supply capacity?
The minimum order quantity is 100 pieces per order. Our monthly supply capacity is up to 10,000 pieces, ensuring reliable and timely delivery for both small and large-volume orders.