M2.6/M3/M4/M5 8.8 grade black hexagon flat head self-tapping screw countersunk hex self-tapping wood screw for Woodworking & Furniture Assembly

Our high-quality carbon steel washers are precision-manufactured to meet industrial standards, ideal for mechanical assembly, equipment fixing, and structural reinforcement scenarios. Made of high-purity carbon steel, the surface is treated with blackening technology to enhance rust resistance and durability, ensuring long-term stable use in various industrial environments.

We offer two types of key washers: spherical washers and tapered washers (complying with GB standards), along with concave-convex washers and bowl-shaped washers, available in M6, M8, and M10 sizes. Each washer is strictly inspected to ensure accurate dimensions, smooth surface, and perfect compatibility with matching bolts, making installation efficient and convenient.

These washers are widely used in industrial equipment, furniture assembly, and mechanical maintenance, effectively reducing friction between fasteners, adjusting installation alignment, and providing reliable support for your assembly projects. They are suitable for both professional industrial use and DIY operations, combining practicality and durability to meet your various fastening needs.