S-90588A113 0.168" ID x 0.61" OD ASME B18.21.1 Internal / External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with internal and external teeth design that bites into mating surfaces, preventing fastener loosening under dynamic loads
• Exceptional corrosion resistance provided by 410 stainless steel construction, ideal for harsh industrial environments
• Precision dimensional compatibility with 0.168" ID and 0.61" OD ensuring perfect fit for No. 8 screws
• Reliable performance standardization through compliance with ASME B18.21.1 specifications
• Enhanced safety and durability with controlled thickness range (0.028-0.034") for consistent locking performance
• Environmental compliance assurance meeting RoHS 3 and REACH regulations for global industrial applications
• Dual-direction locking capability through internal/external tooth configuration providing maximum grip on both surfaces

Professional Applications & Engineering Value

This 410 stainless steel tooth lock washer delivers critical vibration resistance in demanding industrial applications where fastener security is paramount. The unique internal/external tooth configuration creates multiple biting points that dig into both the fastener head and mounting surface, effectively preventing rotational loosening caused by machinery vibrations, thermal cycling, and dynamic loads. Manufactured from 410 stainless steel, this tooth lock washer maintains its locking performance in corrosive environments while providing excellent spring characteristics. The ASME B18.21.1 compliance ensures dimensional precision and mechanical properties suitable for No. 8 screw applications across automotive, machinery, electrical enclosures, and heavy equipment where reliable fastener retention is essential for operational safety and reduced maintenance intervals.

Specification Summary & Compliance

This tooth lock washer features precise dimensional specifications including 0.168" inner diameter, 0.61" outer diameter, and thickness range of 0.028-0.034" specifically engineered for No. 8 screw applications. Manufactured in compliance with ASME B18.21.1 standards for mechanical properties and dimensional requirements. The product meets RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) regulations regarding chemical substances, ensuring environmental safety and regulatory acceptance for industrial use globally.