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China Cross Flange Self Tapping Screw Suppliers - High-Quality Factory Direct at Competitive Prices
| 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 approx. 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
Q What materials are available for flange self-tapping screws?
Flange self-tapping screws are commonly available in carbon steel, stainless steel (304/316), aluminum alloy, and copper. Carbon steel offers high strength at a low cost, while stainless steel provides superior corrosion resistance for humid or chemical environments.
Q What is the difference between Dacromet and galvanized surface treatment?
Dacromet (zinc chromium coating) provides higher corrosion resistance and high-temperature durability with no risk of hydrogen embrittlement, making it ideal for automotive and outdoor use. Galvanizing is more cost-effective and generally sufficient for standard indoor environments.
Q What size range is available for flange self-tapping screws?
Available nominal diameters range from M2 to M12, with M4–M6 being the most widely used. Lengths range from 6mm to 100mm, and flange diameter is typically 2–3 times the screw diameter to provide a wider load-bearing surface.
Q Which industries use flange self-tapping screws most frequently?
These screws are widely used in automotive manufacturing, electronics and appliances, architectural decoration, and mechanical equipment. Their integrated flange design distributes clamping force evenly, making them especially valuable in vibration-prone and high-load environments.
Q What international standards do these screws comply with?
Our flange self-tapping screws conform to GB/T 15856.4 (China), DIN 7500 (Germany), and ANSI/ASME B18.6.4 / SAE J78 (USA), ensuring dimensional consistency and quality compatibility for global procurement and manufacturing requirements.
Q What is the minimum order quantity and monthly supply capacity?
The minimum order quantity is 100 pieces per order. Monthly supply capacity reaches up to 10,000 pieces, supporting both small-batch sampling orders and large-scale production procurement with consistent delivery reliability.