20pcs M3 M4 Black Steel Torx with Pin Column Flat Countersunk Round Pan Button Head Tamper Proof Security Self Tapping Wood Screw

Items DescriptionMaterialCarbon steelSizeProduct displayHign-concerned Chemical : NoneDimensions : M3*4DIY Supplies : WoodworkingDrive Style : Six-LobeModel Number : mhdzzglsHead Style : RoundScrew Type : Self-tapping ScrewsMaterial : Carbon SteelPackage Quantity : Under 50Pcs

• Infrastructure: Composed of a head and a screw, the screw has external threads and is the core component for fastening connections. ​
• Diverse types: mechanical screws, wooden screws, etc. are classified by purpose, and there are countersunk, round, hexagonal, etc. according to shape. ​
• Material characteristics: Common types include carbon steel, stainless steel, copper, etc. The material determines the strength and corrosion resistance. ​
• Thread parameters: Pitch and diameter are key, matching nuts or screw holes is necessary to ensure a stable connection. ​
• Head function: It carries the force of tightening tools and adapts to different shapes of tools such as screwdrivers and wrenches. ​