S-91113A063 1.5" ID x 2.515" OD Internal-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through internal tooth design that bites into mating surfaces, preventing loosening under dynamic loads
• Exceptional durability with Rockwell C44 hardness rating, maintaining structural integrity under high-stress conditions
• Corrosion protection from zinc-plated steel construction, extending service life in demanding industrial environments
• Precise fitment with 1.5" internal diameter specifically engineered for 1 1/2" screw applications
• Optimized load distribution through 2.515" outer diameter design, reducing surface pressure and material fatigue
• Consistent performance with controlled thickness range of 0.076-0.080" ensuring reliable compression and locking action
• Regulatory compliance meeting international standards for safe and sustainable industrial use

Professional Applications & Engineering Value

This internal tooth lock washer delivers critical vibration resistance in demanding industrial applications where fastener security is paramount. The zinc-plated steel construction provides essential corrosion protection while maintaining the Rockwell C44 hardness necessary for high-stress environments. The internal tooth configuration creates multiple biting points that dig into both the fastener and mating surface, creating superior locking action compared to standard washers. This design is particularly valuable in machinery, heavy equipment, and automotive assemblies where constant vibration would otherwise cause conventional fasteners to loosen over time. The precise 1.5" ID ensures perfect compatibility with 1 1/2" screws, while the inch system measurements provide seamless integration with North American industrial standards and replacement part requirements.

Specification Summary & Compliance

This internal tooth lock washer features inch system dimensions with 1.5" internal diameter, 2.515" outer diameter, and thickness range of 0.076-0.080" for consistent performance. Manufactured from zinc-plated steel with Rockwell C44 hardness rating, the washer meets industrial strength requirements. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial applications worldwide.