Home DIYer 100Pcs 3.5x12mm Wafer Head Self Drilling Screws, Black Carbon Steel Self Tapping Wood Screws, Modified Truss Head Sheet Metal Screws for Aluminum, Wood, Plastic, Metal Working

• Premium Carbon Steel Material：Our self drilling screws are made of high-quality black carbon steel, featuring high hardness, good toughness, rust resistance and durable service life, not easy to break or deform during installation.
• Self Drilling & Self Tapping Design：With sharp drill point and deep thread, these wafer head screws can quickly drill and tap holes without pre-drilling, saving time and effort, providing firm and stable fastening.
• Modified Truss Wafer Head：The enlarged modified truss wafer head offers larger contact area, effectively prevents screws from sinking into materials, ensures better pull-through resistance and stable installation.
• Wide Application：These sheet metal screws are perfect for fastening and connecting various materials, including wood, aluminum, plastic, thin metal sheet, widely used in furniture assembly, home repair, construction and DIY projects.
• Practical 100Pcs Package：Comes with 100 pieces M3.5×12 self tapping screws, sufficient quantity to meet your daily use, replacement and project needs, ideal for both professional workers and DIY enthusiasts.

Home DIYer 3.5x12mm wafer head self drilling screws pack includes 100 pieces, constructed with hardened black carbon steel finished with uniform anti-corrosion black coating for long-term indoor fixing and assembly jobs. Classified as modified truss wafer head sheet metal fasteners, these dual-function tek screws combine integrated drill point and precise self tapping thread, supporting one-step drilling and thread cutting without pre-drilling holes, cutting down labor time for all DIY joinery and workshop fixing tasks. The low-profile wide truss wafer head delivers expanded contact surface to distribute clamping force evenly, which lowers risks of surface indentation or pull-through damage on thin aluminum sheets, plastic panels and timber boards. Standard Phillips cross drive slot matches most handheld screwdrivers and electric drill bits, reducing bit slipping and thread stripping during installation to maintain steady torque output. Raw carbon steel receives standardized hardening processing to boost tensile strength and stable clamping power, holding tight under regular vibration for long-lasting assembly. Versatile multi-material sheet metal fasteners fit aluminum alloy profiles, solid wood, plywood, plastic panels and thin metal sheets, widely adopted as cabinet fitting screws, shutter mounting hardware, wall plate fixings, furniture repair bolts and craft DIY joinery supplies. Uniform precision rolled threads enable smooth penetration, avoiding wood splitting and thin metal cracking to leave neat flush surface after tightening. Each fastener follows consistent metric 3.5x12mm dimension control for full interchangeability with matching hardware accessories. Matte black exterior resists minor surface scratches and indoor oxidation to retain consistent tidy appearance across finished projects. The 100-count bulk pack meets demands of small-scale renovation, furniture assembly and daily workshop maintenance, suitable for handymen, DIY enthusiasts, carpenters and metalworking tradespeople. All self tapping wood screws go through standardized quality control with tight tolerance on drill tips, threads and wafer head molding to minimize surface burr defects for reliable metal wood plastic fixings.