S-91074A133 0.53" ID x 0.77" OD Extreme-Vibration-Resistant Wedge Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with dual-sided serrations (top and bottom) that bite into mating surfaces to prevent loosening under dynamic loads
• Exceptional corrosion protection from zinc-flake coating, extending service life in harsh industrial environments
• Precision dimensional fit with 0.53" ID and 0.77" OD engineered for reliable performance with 1/2" screw sizes
• High hardness rating (Rockwell C46) ensures excellent wear resistance and maintains locking force over repeated use
• Dual-sided serration design provides maximum locking security from both top and bottom surfaces
• Full regulatory compliance with RoHS 3 and REACH standards for safe, environmentally responsible manufacturing
• Heavy-duty construction in inch measurement system for compatibility with standard industrial equipment and fasteners

Professional Applications & Engineering Value

This zinc-flake-coated steel wedge lock washer delivers critical vibration resistance in demanding applications where fastener loosening can cause equipment failure or safety hazards. The dual serration design (top and bottom) creates multiple biting edges that dig into both the fastener head and base material, maintaining clamp load even under extreme vibration and thermal cycling. The zinc-flake coating provides superior corrosion resistance compared to standard platings, making it ideal for outdoor equipment, automotive assemblies, and industrial machinery exposed to moisture and chemicals. With precise dimensions (0.53" ID, 0.77" OD) for 1/2" screw sizes and Rockwell C46 hardness, this wedge lock washer ensures reliable performance in heavy machinery, construction equipment, and transportation applications where vibration-induced loosening is a constant concern.

Specification Summary & Compliance

This precision wedge lock washer features inch system dimensions with 0.53" internal diameter and 0.77" outer diameter, designed specifically for 1/2" screw sizes. The washer maintains dimensional accuracy with thickness ranging from 0.090" to 0.110" and achieves Rockwell C46 hardness for optimal performance. Manufactured with top and bottom serrations for maximum locking effectiveness, the product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and workplace safety standards are met for industrial applications.