S-98449A006 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 teeth that bite into mating surfaces, preventing loosening under dynamic loads
• Exceptional corrosion resistance from 400 Series Stainless Steel construction for long service life in harsh environments
• Reliable hardness performance with Rockwell C34 rating ensuring consistent spring action and load distribution
• Precise dimensional fit with 0.136" ID specifically engineered for No. 5 screws, providing secure fastening
• Industry-standard compliance meeting ASME B18.21.1 specifications for quality assurance in critical applications
• Environmental regulatory compliance with RoHS 3 and REACH standards for safe use across global markets
• Optimized tooth design with internal tooth location for concentrated gripping force and minimal surface marring

Professional Applications & Engineering Value

These No. 5 tooth lock washers deliver critical vibration resistance in demanding industrial applications where fastener security is paramount. The 400 Series Stainless Steel construction provides excellent corrosion resistance for outdoor equipment, marine components, and chemical processing machinery. The internal tooth design concentrates gripping force directly under the screw head, preventing rotational slip in high-vibration environments like motors, engines, and heavy machinery. With ASME B18.21.1 compliance, these industrial washers ensure consistent performance in assembly lines, automotive manufacturing, and aerospace applications where fastener failure is not an option. The precise 0.136" ID guarantees perfect fitment with No. 5 screws, eliminating play and maintaining clamping force through thermal cycles and mechanical stress.

Specification Summary & Compliance

This tooth lock washer features inch system dimensions with 0.136" internal diameter, 0.28" outer diameter, and thickness ranging 0.014-0.020". Manufactured to ASME B18.21.1 standards for dimensional accuracy and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for international industrial applications.