Sturiz 60pcs M4 Countersunk Bolts M4x25mm Stainless Steel Bolts Countersunk Screws Flat Head Socket Cap Screws DIN 7991 Full Thread with Hex Spanner For Machinery Equipment and Furniture

• Practical M4 Countersunk Bolts: You will receive 60 Stainless Steel Bolts, sized M4 x 25mm, with a countersunk head. Drive type: hexagon socket; standard: DIN 7991, offering versatility and compatibility. The ample quantity of Countersunk Screws meets diverse everyday maintenance and industrial application needs, making them an ideal choice for household DIY projects.
• Stainless Steel Screws: Countersunk screws are manufactured from A2 V2A stainless steel, offering corrosion resistance and minimal susceptibility to rust. They are robust and durable, featuring a smooth surface free from burrs, with an excellent metallic lustre and wear resistance. These screws are less prone to stripping or deformation. The thread profile is clearly defined, ensuring secure fastening with high strength and excellent stability.
• Easy to use: The countersunk screw has a metric full thread with a precision hex drive that is compatible with hex keys. The countersunk screw comes with a 2.5 mm hex key (19 x 52 mm) and allows for effortless installation for both DIY projects and industrial applications, ensuring a secure and reliable fastening.
• Versatile Application: Stainless steel countersunk hexagon socket screws are suitable for a wide range of indoor and outdoor installation and maintenance scenarios. Whether assembling tables, beds, cabinets, bookshelves, or household appliances, they perform with ease. Countersunk screws find extensive use in furniture manufacturing, home refurbishment, carpentry projects, DIY crafts, equipment maintenance, mechanical engineering, electronic assembly, and model making.
• Countersunk design: Countersunk screws feature a countersunk head design, enabling the screw head to be embedded flush with the surface after installation. This eliminates the risk of scratches or impacts caused by protruding screws, enhancing both the overall aesthetic appeal and the stability and safety of the connection. The countersunk structure also effectively prevents deformation or damage resulting from exposed screw heads, ensuring even stress distribution and long-term durability.

Precautions for Using 304 Stainless Steel Countersunk Hexagon Socket Screws: 1. Avoid high-speed or repeated rotation during installation. Excessive torque may cause stripping, breakage, or damage to the hexagon socket. Use the matching hexagon socket wrench. 2. Whilst 304 stainless steel offers excellent rust resistance, electrochemical corrosion may occur when contacting ordinary steel components or other metals, particularly in damp conditions. Use stainless steel nuts or washers where possible to minimise direct contact between dissimilar metals. 3. Ensure the wrench is fully inserted into the hex socket before applying force during installation to prevent stripping or damaging the socket. 4. Conduct regular inspections and maintenance, particularly for outdoor or damp-environment fittings. Periodically check for signs of loosening, rust, or corrosion. Product Specifications Material: 304 Stainless Steel Colour: Silver Please Note 1. As measurements are taken manually, slight variations may occur. 2. Should you have any queries, please contact us. We shall provide satisfactory service.