Double Ended Thread Screws, M4 M5 M6 Self-Tapping Connector Bolts, Zinc-Plated Carbon Steel Fasteners for Furniture, Sofa(M4*40 (50 pieces))

【Dual Self-Tapping Thread Design】Features a unique double-ended thread that acts as a powerful internal connector. Simply drill a pilot hole and screw both ends into the separate pieces you want to join, creating a strong, hidden fastener that pulls materials tightly together. 【Ideal for Furniture & Wood Assembly】Specifically designed for assembling furniture, sofas, cabinets, and stairs. Perfect for joining wood, particle board, MDF, and plywood. They provide a much stronger connection than standard screws when joining two pieces from the inside. 【Corrosion-Resistant Zinc Coating】Made from durable carbon steel with a protective zinc plating. This coating provides good resistance to rust, ensuring the longevity and integrity of your indoor furniture and DIY projects. 【Comprehensive Size Assortment】Available in the most useful sizes for furniture making: M4, M5, and M6 diameters with various lengths (e.g., M4x20mm to M6x35mm). Each listing is for a bulk pack of 50 pieces of a single size, ensuring you have enough fasteners for your entire project. 【Easy & Invisible Fastening】Makes assembly clean and professional. The screw is entirely hidden within the materials, leaving no visible screw heads on the outside. This results in a cleaner finish and eliminates the need for plugging screw holes.