S-98449A515 0.136" ID x 0.28" 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 for No. 5 screws with precise 0.136" inner diameter ensuring perfect fit and maximum holding power
• Enhanced durability from Rockwell C34 hardness rating that maintains tooth integrity through repeated installation cycles
• Industry-standard compliance with ASME B18.21.1 specifications guaranteeing consistent performance and interchangeability
• Environmental regulation adherence through RoHS 3 and REACH compliance for global manufacturing applications
• Precision thickness control (0.014-0.020") ensuring uniform clamping force and reliable seating in assembled components

Professional Applications & Engineering Value

These internal tooth lock washers deliver critical vibration-dampening performance for industrial assemblies subject to constant motion or shock loads. The 400 Series Stainless Steel construction provides excellent corrosion resistance while maintaining the Rockwell C34 hardness needed for the teeth to effectively bite into both the fastener and workpiece surfaces. This combination addresses common failure points in machinery, automotive, and electrical enclosures where No. 5 screw fastenings are prevalent. The internal tooth location concentrates locking force directly beneath the screw head, creating a secure mechanical lock that outperforms standard flat washers in high-vibration environments. Engineered to prevent rotational loosening and maintain clamp load integrity, these precision washers extend service life while reducing maintenance frequency across countless industrial applications.

Specification Summary & Compliance

This tooth lock washer features precise dimensional specifications including 0.136" ID, 0.28" OD, and thickness ranging 0.014-0.020". Manufactured in compliance with ASME B18.21.1 standards for tooth lock washers, ensuring proper tooth configuration and mechanical properties. The product fully meets RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) regulations regarding substance restrictions. Material certification confirms 400 Series Stainless Steel composition with hardness maintained at Rockwell C34 for consistent performance across production batches.