Hillman 25 Pcs Galvanized Anti-Turn Washers (1/2") | Serrated Lock Washers for Bolts, Nuts & Fasteners | Rust-Resistant Steel Hardware for Wood, Plastic, Aluminum & Structural Fastening

Product Description Hillman 1/2-inch galvanized anti-turn washers are designed to help prevent fasteners from rotating or shifting during installation and long-term use. These washers feature extended barbs that grip into softer materials, helping anchor the washer securely and preventing unwanted movement of bolts or screws. Unlike standard flat washers, anti-turn washers include a specialized design that allows the barbs to bite into the surface of the material being fastened. This added grip helps stabilize the fastener assembly and prevents the washer from spinning while tightening bolts. These washers are particularly effective in applications involving soft substrates such as wood, plastic, and light metals, where the barbs can embed slightly into the material to create a secure mechanical hold. Manufactured from durable steel and finished with a mechanical galvanized coating, these washers provide excellent protection against rust and corrosion. The finish conforms to ASTM A153 standards, helping ensure long-term performance in outdoor environments and structural applications exposed to moisture. The washers also conform to ASTM A156 specifications, ensuring consistent quality and dependable performance in construction, structural fastening, and hardware installations. Packaged in a convenient C-Pak containing 25 washers, these anti-turn washers are ideal for contractors, builders, maintenance professionals, and DIY homeowners working on wood framing, equipment assembly, hardware installation, and other fastening projects where preventing fastener rotation is important. From the Manufacturer The anti-turn washer has serrations that extend radially inward and/or outward to bite into the bearing surface. This type of washer is effective as a lock washer when used with a soft substrate, such as aluminum or plastic.

• Prevents rotation once installed
• Conforms to ASTM A153
• Made of high-strength steel
• Mechanically galvanized finish
• Quality Hillman fasteners