As a trusted bi metal screw manufacturer founded in 1986, Fong Prean combines decades of manufacturing expertise with strict quality controls to deliver reliable fastening solutions for global industrial and construction markets.
At Fong Prean, product excellence is backed by:
- Precision Engineering: We use advanced welding technology to fuse materials, delivering screws that meet demanding technical requirements for torque and shear strength.
- Stringent Quality Control: Our facilities operate under strict QMS, ensuring product consistency and performance in real-world applications (ISO/DIN/ASTM standards).
- Extensive Manufacturing Experience: Decades of expertise in fastener production, serving diverse industries with tailored solutions.
- OEM/ODM Capabilities: We offer full customization including head style, thread types, drill point options, and private label packaging.
- Global Export Readiness: A streamlined logistics network providing export support and documentation for international customers.
Fong Prean’s bi-metal category covers essential head styles and jobsite needs for metal fastening. We support typical construction use cases including roofing, cladding, framing, and multi-material assemblies.
Featured Bi Metal Screw Types
- Bi Metal Hex Washer Head: The go-to for roofing and metal panel fastening. Designed for high torque stability and optimal pairing with EPDM sealing washers.
- Bi Metal Truss Head: Features a wide bearing surface and low profile. Commonly selected for thin-gauge metal sheets and sandwich panels to prevent pull-through.
- Bi Metal Bugle Head: Supports controlled countersinking and a smooth finish, ideal for board-to-metal or light assembly.
- Bi Metal Oval / Pan Head: Versatile finishing heads used where aesthetics and surface contact area are key priorities.
- Bi Metal Flat Head (with/without wings): A self-countersinking option for flush surfaces. Winged styles clear the hole in wood/board materials before the screw engages the metal, preventing jacking.
Bi-metal screws are the standard choice when you need fast installation (no pilot holes) combined with high corrosion resistance. Their composite design prevents the galvanic corrosion often seen when using standard carbon screws on stainless sheets.
Core Applications
- Metal-to-Metal Fastening: For steel panels, purlins, framing, and structural members where drill performance and connection stability are non-negotiable.
- Roofing & Cladding Systems: Essential for securing metal roofing sheets and wall panels exposed to rain, UV, and temperature cycling.
- Sandwich Panels & Corrugated Sheets: Ensures efficient installation and strong retention for insulated panel systems.
- Outdoor Mounting Systems: Used for solar racking and exterior installations where "install-and-forget" durability is required.
Q1: What are bi metal screws?
A1: Bi metal screws are composite fasteners made from two distinct metals welded together: a stainless steel body (for rust resistance) and a hardened carbon steel drill point (for drilling power).
Q2: Why use a bi metal screw instead of standard stainless screws?
A2: Standard stainless steel is often too soft to drill through thick steel substrates. Bi-metal designs solve this by adding a hardened tip to drill the hole, while the stainless body remains to provide the long-term corrosion resistance.
Q3: What are bi metal screws commonly used for?
A3: They are widely used for fastening metal-to-metal, metal-to-wood, and panel systems in construction, especially in roofing, cladding, and structural assemblies where weather resistance is critical.
Q4: How do I choose the correct drill point?
A4: You must match the drill point to the total thickness of the material you are drilling through. Fong Prean provides drill points from No.1 to No.10. Contact our team, and we can help you specify the right point for your steel thickness.
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