S-98438A205 0.102" ID x 0.235" OD ASME B18.21.1 External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through external tooth design that bites into mating surfaces, preventing loosening under dynamic loads
• Exceptional corrosion resistance with 400 Series Stainless Steel construction, ideal for harsh industrial environments
• Optimized hardness performance at Rockwell C34 for durable locking action without material deformation
• Precision dimensional compatibility with No. 3 screws (0.102" ID, 0.235" OD) ensuring perfect fit and function
• Industry-standard compliance with ASME B18.21.1 specifications for reliable mechanical performance
• Environmental regulation adherence meeting RoHS 3 and REACH standards for global supply chain compatibility
• Consistent thickness control (0.010-0.016") for uniform clamping force and reliable joint integrity

Professional Applications & Engineering Value

This external tooth lock washer delivers critical vibration-resistant performance in demanding mechanical assemblies where screw loosening can compromise safety and functionality. Engineered from 400 Series Stainless Steel, it provides excellent corrosion resistance for applications exposed to moisture, chemicals, or outdoor elements. The precisely positioned external teeth create multiple biting points that dig into both the fastener and bearing surface, maintaining clamp load in high-vibration environments like automotive components, industrial machinery, and electrical enclosures. With its specific design for No. 3 screw applications, this washer solves common challenges of joint failure in compact assemblies where space constraints demand reliable, low-profile locking solutions that withstand dynamic operating conditions.

Specification Summary & Compliance

This external tooth lock washer features precise dimensional specifications including 0.102" inner diameter, 0.235" outer diameter, and thickness ranging 0.010-0.016". Manufactured to ASME B18.21.1 standards, it ensures consistent performance and interchangeability. The component is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting current environmental requirements for hazardous substance restrictions. With material hardness maintained at Rockwell C34, this washer delivers reliable mechanical properties for industrial fastener applications requiring durable locking performance.