High-quality Phosphate-black Fine Thread Drywall Screws

They’re designed for connecting gypsum boards to light steel frames (up to ~14 ga). The phosphate coating (black for sleek dark look, gray for matte gray) ensures smooth driving, while fine threads reduce torque and prevent board cracking. Suitable for dry indoor areas; less corrosion-resistant than galvanized types, so avoid humid/outdoor use. Common sizes: #6-#14 (≈M3.5-M6.3) × 13-150mm.