S-92165A029 0.256" ID x 0.478" OD ASME B18.21.1 Internal-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with internal teeth that bite into mating surfaces to prevent loosening under dynamic loads
• Exceptional durability thanks to bronze construction with Rockwell B60 hardness for long service life in harsh environments
• Precise dimensional accuracy with 0.256" ID and 0.478" OD ensuring perfect fit for 1/4" screw applications
• Reliable locking performance meeting ASME B18.21.1 standards for consistent quality and engineering reliability
• Environmental compliance with RoHS 3 and REACH regulations for safe use in regulated industrial applications
• Optimized thickness range (0.023-0.028") providing ideal spring action and consistent clamping force
• Corrosion-resistant properties of bronze material offering excellent performance in various operating conditions

Professional Applications & Engineering Value

These bronze tooth lock washers with internal tooth design provide critical vibration resistance in demanding industrial applications where fastener loosening can lead to equipment failure or safety hazards. The bronze material offers natural corrosion resistance while maintaining the Rockwell B60 hardness needed for repeated use in high-vibration environments. Engineered to ASME B18.21.1 standards, these 1/4 inch washers deliver reliable locking performance in machinery, automotive, and heavy equipment applications where thermal cycling and dynamic loads challenge conventional fastening solutions. The internal tooth configuration ensures maximum bite into both the fastener and workpiece, creating a secure mechanical lock that outperforms standard flat washers in vibration-prone assemblies.

Specification Summary & Compliance

This bronze tooth lock washer features precise inch system dimensions with 0.256" internal diameter and 0.478" outer diameter, specifically designed for 1/4" screw size applications. Manufactured to ASME B18.21.1 specifications with controlled thickness between 0.023-0.028" for consistent performance. The washer is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant (updated 06/14/2023, 235 SVHC), meeting current environmental regulations for industrial use. The internal tooth location provides optimal locking action while the bronze material ensures reliable performance across various operating conditions.