Product Details: Color: Black Material: Carbon Steel Thread Type: Full Thread Size (Dia*Pitch*Length): 5pcs x M8-1.25x30mm/ M8-0.05"x1.18"5pcs x M8-1.25x35mm/ M8-0.05"x1.38"5pcs x M8-1.25x40mm/ M8-0.05"x1.57"5pcs x M8-1.25x45mm/ M8-0.05"x1.77"5pcs x M8-1.25x50mm/ M8-0.05"x1.97" Package Content: 25pcs x Button Head Hex Socket Screws Material - Constructed with carbon steel material with blackening treatment, these hex socket cap screws are of stronger durability, has a bright appearance, is not easier to deform or corrode, and has a long service life than other surface finishes..Feature - The button socket head cap screw is designed with an inner hex drive style and pan head, providing a higher torque and clamping force, as well as offering a wider bearing surface and high tensile strength. Application - Good replacement parts and construction fasteners for use in most machinery industries, automotive industries, electronics industries, manufacturing applications, die fixtures, and clamps.Installation - To access this hex drive screw, you will need to use a hex wrench to tighten or loosen. The socket button head design enhances torque capabilities, allowing for greater clamping force. For optimal results, it is recommended to use a retaining washer to securely lock the hex drive in place.