S-90588A111 0.115" ID x 0.475" OD ASME B18.21.1 Internal / External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with internal and external teeth that bite into mating surfaces, preventing loosening under dynamic loads
• Corrosion-resistant 410 stainless steel construction ensures long-term durability in harsh industrial environments
• Precise dimensional fit with 0.475" OD and 0.115" ID designed specifically for No. 4 screw applications
• ASME B18.21.1 compliance guarantees consistent quality and performance in mechanical assemblies
• Dual tooth location design provides maximum locking force from both internal and external contact points
• Environmental compliance with RoHS 3 and REACH standards for safe use in regulated industries
• Consistent thickness control (0.016-0.021") ensures reliable performance and uniform pressure distribution

Professional Applications & Engineering Value

This 410 stainless steel tooth lock washer delivers exceptional engineering value in applications where vibration-induced loosening compromises assembly integrity. The unique internal/external tooth configuration creates multiple biting points that dig into both the fastener and substrate, maintaining secure locking force in high-vibration environments like automotive assemblies, industrial machinery, and electrical enclosures. Manufactured from 410 stainless steel, this ASME B18.21.1 compliant washer resists corrosion while providing reliable performance in temperature-fluctuating conditions. The precise dimensional specifications ensure perfect compatibility with No. 4 screw sizes, making it an ideal solution for maintenance, manufacturing, and OEM applications requiring dependable vibration resistance without frequent retightening.

Specification Summary & Compliance

This tooth lock washer features inch system dimensions with 0.475" OD, 0.115" ID, and thickness ranging 0.016-0.021". Manufactured to ASME B18.21.1 specifications for mechanical accuracy and performance consistency. The product is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant (updated 06/14/2023, 235 SVHC), meeting international environmental standards for industrial components. Designed specifically for No. 4 screw applications with internal/external tooth location for optimal locking performance.