S-90588A118 0.512" ID x 1.26" OD ASME B18.21.1 Internal / External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through dual internal/external teeth design that maintains secure locking under dynamic loads
• Exceptional corrosion resistance with 410 stainless steel construction for long-lasting performance in harsh industrial environments
• Precise dimensional accuracy with 0.512" ID and 1.26" OD ensuring perfect fit for 1/2" screw applications
• Reliable compliance with ASME B18.21.1 standards for consistent quality and performance in critical assemblies
• Environmental responsibility with RoHS 3 and REACH compliance for safe use across regulated industries
• Optimized thickness range (0.047-0.055") providing ideal spring tension and load distribution
• Dual-direction locking action from internal and external teeth creating multiple biting surfaces for maximum security

Professional Applications & Engineering Value

This 410 stainless steel tooth lock washer delivers exceptional engineering value in demanding applications where vibration-induced loosening compromises assembly integrity. The unique internal/external tooth configuration creates multiple biting surfaces that dig into both the fastener and mating surface, providing superior resistance to rotational forces in 1/2" screw applications. The 410 stainless steel material offers excellent corrosion resistance while maintaining the necessary hardness for repeated use in heavy machinery, automotive assemblies, and industrial equipment. This tooth lock washer effectively solves the critical problem of joint failure in high-vibration environments, ensuring long-term reliability in industrial applications where maintenance access is limited and failure costs are significant.

Specification Summary & Compliance

This precision tooth lock washer features exact dimensional specifications including 0.512" internal diameter, 1.26" outer diameter, and thickness ranging from 0.047" to 0.055" for optimal performance in 1/2" screw applications. Manufactured to ASME B18.21.1 standards for dimensional accuracy and mechanical properties, this component ensures reliable performance in critical assemblies. The washer is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, making it suitable for use across various regulated industries and international markets.