S-91150A113 0.32" ID x 0.607" OD ASME B18.21.1 Internal-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with internal teeth design that bites into mating surfaces to prevent fastener loosening under extreme dynamic loads
• Exceptional durability from Grade 8 steel construction with Rockwell C44 hardness, ensuring long service life in demanding industrial applications
• Enhanced corrosion protection through zinc plating, providing reliable performance in various environmental conditions
• Precise dimensional compatibility with 5/16" fasteners, featuring 0.32" ID and 0.607" OD for optimal fit and locking performance
• Maximum locking force achieved through internal tooth configuration that maintains constant tension and prevents rotational slippage
• Industry-standard compliance with ASME B18.21.1 specifications, ensuring consistent quality and performance in mechanical assemblies
• Environmental responsibility with RoHS 3 and REACH compliance, meeting strict international regulatory standards

Professional Applications & Engineering Value

These Grade 8 zinc-plated steel tooth lock washers provide critical vibration-resistant solutions for heavy-duty industrial applications where fastener security is paramount. The internal tooth design creates multiple biting points that dig into both the fastener and mating surface, effectively preventing loosening caused by vibration, thermal cycling, and dynamic loading conditions. Manufactured from high-strength steel with Rockwell C44 hardness, these washers maintain their locking capability even under extreme pressure and repeated stress cycles. The zinc plating offers superior corrosion resistance, making them ideal for outdoor equipment, automotive assemblies, heavy machinery, and construction applications where environmental exposure is a concern. Engineered to ASME B18.21.1 standards, these precision washers deliver reliable performance in critical fastening systems where failure is not an option.

Specification Summary & Compliance

This tooth lock washer features precise dimensional specifications including 0.32" internal diameter, 0.607" outer diameter, and thickness ranging from 0.040" to 0.050" for optimal performance with 5/16" fasteners. Manufactured to ASME B18.21.1 standards, these washers ensure consistent quality and dimensional accuracy. The product maintains full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental responsibility and safety standards. The internal tooth configuration provides maximum locking effectiveness while the Grade 8 material classification and Rockwell C44 hardness guarantee exceptional strength and durability for the most demanding industrial applications.