S-91074A378 2.64" ID x 3.74" OD Extreme-Vibration-Resistant Wedge Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through dual-sided serrations that bite into mating surfaces, preventing loosening under extreme conditions
• Exceptional corrosion protection with zinc-flake coating that provides long-lasting durability in harsh industrial environments
• Optimized dimensional compatibility with precise 2.64" ID and 3.74" OD sizing for perfect fit with 2 1/2" screws and M64 fasteners
• Enhanced mechanical strength from Rockwell C46 hardness rating, ensuring reliable performance under heavy loads
• Universal application flexibility supporting both inch and metric systems for diverse industrial requirements
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for safe, environmentally responsible manufacturing
• Consistent thickness control (0.270-0.290") for uniform clamping force and reliable joint integrity

Professional Applications & Engineering Value

This zinc-flake-coated steel wedge lock washer delivers critical engineering solutions for industries where vibration-induced fastener failure poses significant operational risks. The dual serration design (top and bottom) creates multiple biting surfaces that mechanically resist rotational forces, making it ideal for heavy machinery, construction equipment, and transportation applications. The high-strength steel construction with Rockwell C46 hardness maintains structural integrity under repeated stress cycles, while the corrosion-resistant zinc-flake coating extends service life in outdoor or chemically aggressive environments. Engineered to accommodate both 2 1/2" screw sizes and M64 metric fasteners, this washer provides versatile compatibility across international standards, reducing inventory complexity for global operations.

Specification Summary & Compliance

This heavy-duty wedge lock washer features precise dimensional specifications with 2.64" inner diameter, 3.74" outer diameter, and controlled thickness between 0.270-0.290". Manufactured from high-strength steel with Rockwell C46 hardness and zinc-flake coating for optimal performance. The product maintains full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmentally responsible manufacturing and safe usage across industrial applications.