S-98449A011 0.204" ID x 0.381" OD ASME B18.21.1 Internal-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with internal tooth design that bites into mating surfaces to prevent loosening under dynamic loads
• Exceptional corrosion resistance provided by 400 Series Stainless Steel construction for long-term reliability in harsh environments
• Optimized mechanical strength with Rockwell C34 hardness rating ensuring consistent performance under high stress conditions
• Precision dimensional compatibility with 0.204" ID and 0.381" OD designed specifically for No. 10 screws
• Industry-standard compliance meeting ASME B18.21.1 specifications for guaranteed interchangeability and performance
• Environmental regulation adherence with RoHS 3 and REACH compliance for global manufacturing applications
• Consistent thickness control between 0.018-0.024" ensuring reliable seating and uniform clamping force

Professional Applications & Engineering Value

This No. 10 tooth lock washer delivers critical vibration-resistant performance for demanding industrial applications where fastener security is paramount. Engineered from 400 Series Stainless Steel, it provides excellent corrosion resistance while maintaining structural integrity in challenging environments. The internal tooth location design ensures maximum biting action into both the fastener and mating surface, creating a mechanical lock that prevents rotation and loosening caused by vibration, thermal cycling, or dynamic loading. Particularly valuable in machinery, automotive assemblies, and electrical enclosures, these ASME B18.21.1 compliant washers offer reliable performance where traditional flat washers fail. The combination of Rockwell C34 hardness and precise dimensional control ensures consistent performance across production runs, reducing maintenance intervals and preventing equipment downtime.

Specification Summary & Compliance

This tooth lock washer features inch system dimensions with 0.204" internal diameter and 0.381" outer diameter, specifically designed for No. 10 screw applications. Manufactured to ASME B18.21.1 standards ensuring dimensional accuracy and performance reliability. The washer maintains thickness between 0.018-0.024" with internal tooth configuration for optimal locking performance. Compliance certifications include RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) with current substance compliance as of June 14, 2023, making it suitable for regulated industries and international markets.