Description: Material: Flat head Torx drive screw is made of 10.9 grade carbon steel, black oxidized, with high hardness, good corrosion resistance, firmness, wear resistance, and low-temperature resistance. Design: The screw head adopts a countersunk head and Torx drive design, which makes it very suitable for fastening applications in narrow areas. It can provide better torque and clamping force, wider bearing surface, and high tensile strength. Easy to Use: Pre-drill with a suitable drill bit, put the internal torx countersunk screw into the hole, and tighten it with a Torx wrench or screwdriver. The tightening force needs to be adjusted during installation to avoid over-tightening or under-tightening, resulting in loosening or damage. Application: Torx anti theft machine screws are widely used in industries that require fastenings, such as home hardware, machine tools, electrical products, mechanical equipment, ship,s, and DIY projects, and are suitable for professionals, repairmen,n and DIY enthusiasts. Specifications: Color: Black Material: Carbon Steel Drive System: T40 Head Style: Flat Countersunk Head Diameter: 15.8mm/0.62 inch Pitch: 1.25mm/0.05 inch Thread Size: M8x25mm/M8x0.98 inch(D*L) Package Contents: 12pcs x Flat Torx Head Machine Screws