dry wall nail black self-tapping screw nail woodworking nail gypsum board special countersunk head drywall screw wood screw m3.5 干壁钉黑色自攻螺丝钉子木工钉石膏板专用沉头墙板钉木镙丝钉M3.5

This black drywall screw is a multi-purpose and efficient self-tapping screw designed for the installation of gypsum board, lightweight wall panels, and wood materials. It features a recessed head structure, which provides a flat surface after installation, making it convenient for subsequent decoration processes. The sharp self-tapping tip with deep threads can easily penetrate and ensure a firm fixation. The surface is treated with corrosion resistance, making it durable. The product is based on the M3.5 specification and supports flexible customization in terms of size and material (such as carbon steel, stainless steel), fully meeting your specific construction needs. Factory direct supply, reliable quality, suitable for various indoor decoration and woodworking projects, it is a practical choice for engineering and home decoration.