S-97527A009 0.32" ID x 0.885" OD Internal-Tooth Lock Washers for Soft Material

Key Features & Benefits at a Glance

• Superior vibration resistance with internal tooth design that bites into mating surfaces to prevent loosening under dynamic loads
• Enhanced corrosion protection through zinc-plated steel construction for extended service life in harsh environments
• Exceptional hardness rating of Rockwell C44 ensures minimal deformation under high clamping forces
• Precise dimensional compatibility with 5/16" fasteners (0.32" ID x 0.885" OD) for reliable fit and consistent performance
• Optimized thickness range (0.060-0.064") provides ideal spring action while maintaining structural integrity
• Regulatory compliance assurance with RoHS 3 and REACH standards for global market acceptance
• Internal tooth configuration concentrates locking force directly under the screw head for maximum security

Professional Applications & Engineering Value

This internal tooth lock washer delivers critical vibration-damping performance for industrial applications where 5/16" fasteners face constant dynamic stress. The zinc-plated steel construction provides essential corrosion resistance while maintaining the Rockwell C44 hardness needed to withstand repeated loading cycles without permanent deformation. The internal tooth location creates multiple biting points that dig into both the fastener head and base material, effectively resisting rotational forces that cause conventional washers to fail. Engineered for heavy-duty locking in machinery, automotive assemblies, and structural frameworks, this washer solves the persistent problem of fastener loosening in high-vibration environments while meeting stringent RoHS 3 and REACH compliance requirements for modern manufacturing.

Specification Summary & Compliance

Manufactured to inch system specifications with precise dimensions: 0.32" internal diameter, 0.885" outer diameter, and thickness ranging 0.060-0.064". Designed specifically for 5/16" screw applications with internal tooth configuration. The zinc-plated steel material provides consistent performance with Rockwell C44 hardness rating. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and global market acceptance for industrial applications.