FandWay M4.2x25mm Torx Self Tapping Screws Metal,100 Pcs Torx Countersunk Self Drilling Screws,Flat Head Sheet Metal Tek Screw 410 Stainless Steel Black Coating With 1 T20 Bits For Aluminum Metalwork

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  • Durable Material These screws are made from premium 410 stainless steel and Black Dacromet coatings.Passes salt spray tests, Super corrosion resistance offering 5-10x higher corrosion resistance than zinc plating black oxide.It is very suitable for outdoor and wet conditions.(Tips 410 Stainless Steel Is A New Type Of Magnetic-Absorbing Stainless Steel so they are also still magnetic.)
  • Structure & Function Featuring a drill-shaped tip with cutting grooves or spiral flutes, drill point screws integrate drilling and tapping functions. The self-drilling design eliminates the need for pre-drilling holes, enabling direct penetration into materials like metal sheets, wood, and plastic for rapid installation.
  • STAR TORX DRIVE Free 1 T20 Torx Bit ---Star Torx drive screws with 6 contact points prevent stripping, save drive torque and further fasten screws into metal construction, eliminate loose or camout.
  • How to choose the size Match screw length to material thickness M4.2 screws for 1.75-3mm steel plates.Their self-drilling and self-tapping capabilities might be limited when dealing with extremely hard or overly dense materials. It is necessary to assess the material properties beforehand.
  • Wide range of applications 1- Construction Fixing color steel plates, aluminum profiles, and light-gauge steel frames. 2 - Home Improvement Assembling furniture, wooden frames, and plastic components. 3 - Industrial Manufacturing Joining thin metal sheets in automotive mechanical equipment and corrosion-resistant outdoor installations.

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