Screw and Washer Assembly

The screw and washer assembly is an innovative fastener designed for efficient assembly. Its defining feature is the permanently integrated screw and washer. The primary advantages of this assembly include the elimination of loose washers, improved vibration resistance, and significantly higher assembly efficiency. Manufactured in accordance with ISO 10664 standards, the washer is cold-forged integrally with the screw head, ensuring a secure connection with no risk of separation. The washer surface typically features anti-slip textures that increase friction and enhance anti-loosening performance. Using standard 6g precision machine threads, the screw and washer assembly is well suited for fast-paced, high-volume hardware manufacturing applications.

Screw and washer assemblies are widely used in mass production environments such as automotive manufacturing, home appliance assembly lines, electronics production, and furniture manufacturing. In automotive production, they are ideal for fastening body panels and interior components; the integrated design reduces part handling and assembly steps, thereby accelerating production speed. In home appliance manufacturing - such as refrigerators and washing machines - they are used to secure outer casings to internal frames, with anti-loosening performance ensuring long-term product stability. In electronics assembly, including mobile phones and computers, these fasteners enable rapid installation and increased output. In furniture mass production, they simplify the assembly of tables, chairs, and cabinets while reducing labor costs. As a result, the screw and washer assembly is an efficient solution for high-volume hardware assembly.

These assemblies are manufactured from high-quality carbon steel 1022A, stainless steel 304, or alloy steel 20Cr. Carbon steel meets the 4.8 strength grade for general-purpose applications, stainless steel provides corrosion resistance in humid environments, and alloy steel achieves an 8.8 strength grade for more demanding conditions. Available surface treatments include zinc plating (ASTM B633), nickel plating (ASTM B733), and passivation for stainless steel, providing 48–72 hours of salt spray corrosion resistance. All products are ISO 9001 certified, with washer thickness tolerances controlled within ±0.02mm to ensure a secure fit with the mating material. Customization is available for different washer diameters, increased washer thickness, extended screw lengths (50–80mm), and specialized surface treatments. Screw and washer assemblies are sorted by specification and packaged in bulk cartons of 1,000–5,000 pieces, supporting mass production requirements and significantly improving assembly efficiency.