S-95795A012 0.195" ID x 0.601" OD ASME B18.21.1 Internal / External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with internal and external teeth that bite into mating surfaces, preventing loosening under dynamic loads
• Enhanced durability and corrosion protection through zinc-plated steel construction, extending service life in harsh industrial environments
• Reliable performance for No. 10 screws with precise 0.195" ID, ensuring perfect fit and optimal clamping force distribution
• High mechanical strength backed by Rockwell C40 hardness, maintaining tooth integrity under high-pressure applications
• Industry-standard compliance with ASME B18.21.1 specifications, guaranteeing dimensional accuracy and functional reliability
• Environmental responsibility with full RoHS 3 and REACH compliance, meeting strict international regulatory requirements
• Versatile internal/external tooth design providing maximum grip on both bolt head and surface contact areas

Professional Applications & Engineering Value

This zinc-plated steel tooth lock washer delivers critical vibration-resistant performance for demanding industrial applications where fastener security is paramount. The unique internal/external tooth configuration creates multiple biting points that aggressively resist rotational loosening caused by machinery vibration, thermal cycling, and dynamic loading conditions. Engineered to ASME B18.21.1 standards, this heavy-duty washer maintains reliable preload in automotive assemblies, heavy equipment manufacturing, electrical enclosures, and structural frameworks. The zinc plating provides sacrificial corrosion protection while the Rockwell C40 hardness ensures teeth maintain their biting capability through repeated torque cycles. This combination of material properties and precision engineering solves the common industrial challenge of fastener failure in high-vibration environments.

Specification Summary & Compliance

This tooth lock washer features precise dimensional specifications including 0.195" ID, 0.601" OD, and 0.027-0.031" thickness, manufactured to ASME B18.21.1 standards for inch system fasteners. The washer is designed specifically for No. 10 screw applications and meets comprehensive compliance requirements including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations. The internal/external tooth location provides maximum locking effectiveness while maintaining material integrity through Rockwell C40 hardness certification.