M2/M3/M4/M5 8.8 Grade Cylindrical Hex Head Self-Tapping Screws Black Wood Screws for Wood & Furniture Assembly

8.8 Grade Cylindrical Hex Head Self-Tapping Screws (HA Cup Head) are professional woodworking fasteners, engineered with high-strength 8.8 grade steel and a black finish to deliver exceptional durability, grip, and performance for wood, furniture, and DIY applications. Designed as self-tapping screws, they feature a sharp, threaded design that eliminates the need for pre-drilling, making installation quick and efficient—ideal for both professionals and DIY enthusiasts.

 

Crafted from 8.8 grade steel, these screws offer superior tensile strength and load-bearing capacity, ensuring a secure, long-lasting hold in various wood materials (including softwood, hardwood, and composite wood). The black finish provides an extra layer of corrosion resistance, protecting against rust and wear, while also offering a sleek, professional look that complements woodworking and furniture projects.

 

Available in HA cup head (cylindrical hex head) design, these self-tapping screws feature a hexagonal head that allows for easy tightening with standard hex wrenches, minimizing slippage and ensuring precise installation. The self-tapping threads are engineered to cut into wood smoothly, creating a tight, secure bond that resists loosening even with frequent use or vibration.

 

Offered in M2, M3, M4, and M5 sizes, these black wood screws are versatile for a wide range of applications: from furniture assembly (chairs, tables, cabinets) and woodworking projects (shelves, decks, fences) to household repairs and outdoor wood installations. Suitable for carpenters, woodworkers, DIY hobbyists, and professionals, they combine functionality, strength, and convenience to simplify any wood fastening task.