S-93281A113 0.34" ID x 0.65" OD Extreme-Vibration-Resistant Wedge Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with dual top and bottom serrations that bite into mating surfaces, preventing loosening under dynamic loads.
• Enhanced corrosion protection from the zinc-flake coating, extending service life in harsh industrial environments.
• Exceptional mechanical strength with a Rockwell C46 hardness, ensuring the washer maintains its locking force and shape under high stress.
• Broad compatibility for both 5/16" (inch) and M8 (metric) screw sizes, simplifying inventory for global operations.
• Reliable dimensional stability with precise 0.34" ID and 0.65" OD, providing a secure fit and consistent performance.
• Compliance with major environmental regulations including RoHS 3 and REACH, ensuring safety and suitability for regulated markets.
• Durable wedge lock design that creates a continuous spring force, ideal for heavy-duty applications requiring long-term fastener security.

Professional Applications & Engineering Value

This zinc-flake-coated steel spring lock washer is engineered to solve critical challenges in machinery, automotive, and construction assemblies where vibration-induced loosening is a primary failure mode. The wedge lock mechanism, combined with top and bottom serrations, provides a multi-directional grip that significantly outperforms standard washers. The high Rockwell C46 hardness ensures the serrations do not deform, maintaining locking pressure in high-torque and thermal cycling conditions. Its compatibility with both 5/16" and M8 screw sizes makes it a versatile component for OEMs and MRO operations dealing with mixed inch and metric systems. The robust zinc-flake coating offers superior resistance to corrosion, making it suitable for outdoor and chemically exposed environments, thereby reducing maintenance frequency and lifecycle costs.

Specification Summary & Compliance

This washer features an ID of 0.34", OD of 0.65", and a thickness range of 0.080-0.090". It is designed for 5/16" and M8 screw applications and is manufactured from high-strength steel with a Rockwell C46 hardness. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets the latest environmental and safety standards for industrial components.