Flat countersunk screw is suitable for power, aerospace, office equipment, petrochemical, electronics, communications, shipbuilding industry, machinery, etc. You can also see them in construction, manufacturing, engineering, assembling, landlord, repairmen, and other DIY projects. Specification Color: Black Material: Carbon Steel Thread Size: M2.5x12 mm Outside Diameter: 5 mm/0.2 Inch Length: 12 mm/0.47 Inch Inner Hex Dia: 1.5 mm/0.06 Inch Pitch: 0.5 mm / 0.02 Inch Strength Level: 10.9 Grade Packing List: 100 Pcs x Flat Head Socket Cap Screws + 1Pcs x Hex Spanner Advantage Hex Drive Machine Screws: Made of durable carbon steel, strength level is 10.9 grade, wear-resistant, providing good strength and corrosion resistance in bad environments. Good Stability & Beautiful Surface: Hex drive countersunk bolts with clear threads, provide stability and can be used for a long time. Beautifully cut, and the head is flat. Provide a good decoration, easy to use, and install. Instruction All screws are coated with anti-rust oil for better performance. All hexagon head screws come with 1 Hex Spanner, various sizes and precise threads for different applications. NOTE: Please confirm the size before placing an order.