S-95795A024 0.32" ID x 0.898" OD ASME B18.21.1 Internal / External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through internal and external teeth that bite into mating surfaces, preventing loosening under dynamic loads
• Enhanced durability with Rockwell C40 hardness rating that maintains tooth integrity and locking performance through repeated use
• Corrosion protection via zinc plating that extends service life in various industrial environments
• Precise dimensional compatibility with 0.32" ID and 0.898" OD ensuring perfect fit for 5/16" screw applications
• Reliable performance standards meeting ASME B18.21.1 specifications for consistent quality and predictable behavior
• Environmental compliance with RoHS 3 and REACH regulations for safe use in regulated industries
• Optimized thickness range (0.033-0.037") providing ideal spring tension while maintaining installation clearance

Professional Applications & Engineering Value

This tooth lock washer delivers exceptional engineering value in applications where vibration-induced loosening compromises assembly integrity. The zinc-plated steel construction provides both mechanical strength and corrosion resistance, while the unique internal/external tooth configuration creates multiple biting surfaces that resist rotational forces more effectively than single-tooth designs. The Rockwell C40 hardness ensures teeth maintain their sharpness and locking capability through numerous installation cycles. Particularly valuable in heavy machinery, automotive assemblies, and industrial equipment where 5/16" screw fasteners experience constant vibration, this washer prevents costly maintenance downtime and potential safety hazards by maintaining consistent clamping force. The combination of precise dimensional control and standardized manufacturing according to ASME B18.21.1 ensures reliable performance across production batches and replacement scenarios.

Specification Summary & Compliance

This tooth lock washer features precise dimensional specifications including 0.32" inner diameter, 0.898" outer diameter, and thickness ranging from 0.033" to 0.037" for consistent performance in 5/16" screw applications. Manufactured to ASME B18.21.1 standards, it ensures proper tooth configuration and mechanical properties. The washer is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting current environmental standards for industrial components. The Rockwell C40 hardness provides optimal balance between deformation resistance and installation flexibility, while the zinc plating offers corrosion protection suitable for various operating environments.