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GREMAH Black Oxide Drywall Screws – High-Strength Fasteners for Fiber Cement Boards & Gypsum Boards.

Product Highlights
  • Unmatched Corrosion Resistance: Treated with an advanced black oxide coating, these screws offer exceptional resistance to rust and moisture. This makes them the perfect companion for both interior drywalls and demanding exterior cladding projects.
  • Self-Piercing Sharp Point: Engineered to effortlessly penetrate dense materials—including GREMAH Fiber Cement Boards and heavy-duty metal studs—without the need for pre-drilling. Save valuable time and energy on every job site.
  • Precision Threading for Superior Grip: Designed with sharp, fine threads that bite instantly and hold tight. Say goodbye to wobbly panels; these screws ensure a rigid, secure fit that won’t loosen over time.
  • Seamless Bugle Head Finish: The specialized bugle head countersinks flawlessly into the board surface. It creates a perfectly smooth, flush finish without tearing the drywall paper or fracturing hard cement boards.
  • Built for Structural Integrity: Crafted from high-carbon steel, these heavy-duty fasteners align perfectly with GREMAH’s promise of superior durability and long-lasting structural strength.
Product Description
Introduction
When it comes to building flawless, long-lasting structures, the strength of your framework comes down to the smallest details. Backed by over 20 years of hands-on expertise in the building materials industry, GREMAH introduces our Black Oxide Drywall Screws—the ultimate fastening solution designed for modern architecture. Whether you are installing high-performance Fiber Cement Boards, framing a new office partition, or securing a beautiful false ceiling, these screws are engineered to deliver unmatched precision and reliability. Unlike standard fasteners, our drywall screws feature a protective black oxide finish that drastically reduces friction during installation while offering superior defense against rust and environmental wear. Combined with a razor-sharp piercing point and a bugle head that sits perfectly flush, GREMAH drywall screws guarantee a smooth, professional-grade finish every single time. Build the future with confidence, knowing your walls are held together by uncompromising quality.
Recommended Applications
• Interior Drywall & Partitions: Securely fastening standard and moisture-resistant gypsum boards to metal or wood studs. • Fibre Cement & Calcium Silicate Boards: Perfect for installing high-density boards in demanding environments. • Exterior Wall Cladding: Providing reliable, rust-resistant holds for exterior facades and cladding systems. • False Ceilings & Mezzanine Flooring: Ensuring structural integrity for overhead and load-bearing drywall concepts. • Acoustic & Thermal Insulation Panels: A secure fastening solution that won't compromise your insulation barriers.
Installation Guidelines
1. Select the Right Length: Ensure the screw is long enough to penetrate the framing stud by at least 5/8 inch (15.9mm) for metal and 1 inch (25mm) for wood. 2. Use the Right Tool: For best results, use a standard screw gun or a drill with an adjustable depth-setting clutch. This prevents overdriving and board damage. 3. Proper Spacing: Space screws approximately 12 inches (300mm) apart on ceilings and 16 inches (400mm) apart on walls to ensure even weight distribution. 4. Drive to the Perfect Depth: Drive the screw until the bugle head sits just below the surface of the board, creating a small dimple. Do not break the surface paper or crack the cement board layer. 5. Mudding & Taping: Once installed, cover the recessed screw heads with joint compound to achieve a perfectly seamless, paint-ready wall.
FAQ
Q: Are these Black Oxide screws suitable for high-moisture areas?
Yes! The black oxide coating provides an excellent layer of corrosion resistance, making them ideal for kitchens, bathrooms, and exterior cladding applications.
Q: Do I need to pre-drill holes before using these on Fibre Cement Boards?
No pre-drilling is necessary. Our screws feature a self-piercing sharp point designed to effortlessly penetrate dense fibre cement boards and metal studs.
Q: Why should I choose black oxide screws over standard zinc-plated screws?
Black oxide not only offers robust rust protection but also reduces friction during drilling. This means the screw drives in faster and smoother, preventing motor burnout on your tools and reducing fatigue.
Q: Will the screw head tear the drywall paper?
Not at all. The specialized bugle head is intentionally designed to press down the drywall paper without cutting it, ensuring a strong hold and a perfect dimple for your joint compound.
Q: Can I use these screws for wood framing as well as metal?
Absolutely. While they are highly effective for light-gauge metal studs, the sharp, deep threads provide an equally aggressive and secure grip in wooden framing.
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