50/100pcs #8 M4.2 410 Stainless Steel Self Tapping Screws Large Round Truss Flat Head Self Drilling Screw Metal Sheet Wood

💥 ONE-STEP DRILLING & FASTENING (NO PRE-DRILLING): Engineered with a razor-sharp tail tip, these #8 M4.2 self-drilling tek screws slice through sheet metal, aluminum, and hard wood effortlessly in seconds. Save your time and skip the pre-drilling hassle!🧲 PREMIUM 410 STAINLESS STEEL & STRONG MAGNETIC: Made of heavy-duty 410 stainless steel, providing superior hardness and tensile strength compared to 304. Unlike 304, 410 grade is naturally magnetic, allowing easy attachment to your electric screwdriver/bit for hassle-free one-handed or overhead operations.🔩 LARGE TRUSS HEAD & MAXIMUM CLAMPING FORCE: The extra-wide round flat truss head (modified truss head) acts as a built-in washer. It dramatically increases the load-bearing surface area, distributing pressure evenly to prevent tearing or warping thin sheet metal.🛠️ DEEP PHILIPS DRIVE - ANTI-SLIP & NO STRIPPING: Precision-cut deep cross recess ensures a tight fit with your Philips drive bits. Say goodbye to stripping, slipping, or head-snapping under high-torque impact drivers.📦 MULTI-SIZE ESSENTIAL KIT FOR VERSATILE REPAIRS: Available in various lengths from 13mm to 38mm with 50pcs/100pcs bulk pack options. The perfect fastening hardware for sheet metal construction, metal roofing, HVAC installations, gutter repairs, carpentry, and home DIY framing projects.ParameterSpecification DetailsProduct Name#8 M4.2 Stainless Steel Truss Head Self-Drilling ScrewsMaterial GradeHigh-Hardness 410 Stainless SteelHead TypeLarge Round Flat / Modified Truss Head / Washer HeadDrive StylePhilips Cross Drive (Deep Recess)Thread/Gauge Size#8 (M4.2 / Nominal Diameter 4.2mm)Head DiameterApprox. 10.0mm - 10.5mmAvailable Lengths (L)13mm (1/2"), 16mm (5/8"), 19mm (3/4"), 25mm (1"), 32mm (1-1/4"), 38mm (1-1/2")Point TypeSelf-Drilling Tek Point (Tail style)Application ScopeSteel Sheet, Color Steel Tile, Iron Plates, Wood, Plastics, Aluminum ProfilesPackage Options50 Pcs / 100 Pcs Per PackQ1: Can these screws be used on steel plates? What is the maximum thickness they can drill?A: Yes, absolutely! These 410 stainless steel self-drilling screws are designed for metal-to-metal and metal-to-wood applications. They can smoothly drill through thin metal sheets, aluminum profiles, and iron plates up to 1.5mm–2.0mm thickness without pre-drilling.Q2: Are these screws magnetic? I thought stainless steel isn't magnetic.A: Yes, they are highly magnetic! While 304/316 stainless steel is non-magnetic, 410 stainless steel is a martensitic grade which possesses excellent hardness and inherent magnetism. This is a massive advantage for construction, as the screws will stick firmly to your magnetic screwdriver bits during overhead or tight-space jobs.Q3: Can I use these for outdoor projects? Will they rust?A: 410 stainless steel offers moderate rust resistance and exceptional hardness, making it perfect for most indoor repairs and covered outdoor applications (like HVAC, roofing, cladding). However, if your project involves permanent exposure to heavy coastal saltwater or chemical environments, we highly recommend choosing 304 or 316 grade instead.