S-98449A530 0.195" ID x 0.381" 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 corrosion resistance provided by 400 Series Stainless Steel construction for long service life in harsh environments
• Precision dimensional compatibility with 0.195" ID specifically engineered for No. 10 screws in inch system applications
• Enhanced load distribution through optimal 0.381" OD design that minimizes surface stress and material deformation
• Consistent performance reliability ensured by Rockwell C34 hardness rating for maintained tooth integrity under repeated use
• Industry-standard compliance with ASME B18.21.1 specifications for guaranteed dimensional accuracy and functional performance
• Environmental regulation adherence through RoHS 3 and REACH compliance for global manufacturing applications

Professional Applications & Engineering Value

These internal tooth lock washers deliver critical vibration-resistant fastening solutions for demanding industrial applications where secure connections are paramount. Engineered from 400 Series Stainless Steel, they provide excellent corrosion resistance while maintaining structural integrity in harsh operating environments. The strategically positioned internal teeth create positive locking action by embedding into both the screw head and mounting surface, effectively preventing rotational loosening caused by machinery vibrations, thermal cycling, or dynamic loads. Particularly valuable in assembly operations requiring No. 10 screw compatibility, these washers ensure reliable performance in automotive components, electrical enclosures, industrial machinery, and precision equipment where vibration-induced fastener failure poses significant operational risks. The combination of material strength, precise dimensional control, and specialized tooth configuration addresses the fundamental challenge of maintaining clamp force in vibration-prone applications.

Specification Summary & Compliance

This internal tooth lock washer maintains precise dimensional specifications with 0.195" inner diameter, 0.381" outer diameter, and thickness ranging 0.018-0.024" for consistent performance. Manufactured to ASME B18.21.1 standards for dimensional accuracy and functional requirements in inch system applications. The washers are fully compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and meet REACH (EC 1907/2006) requirements including the latest SVHC updates as of June 2023, ensuring environmental responsibility and global market acceptance.