S-98449A035 0.64" ID x 1.071" OD ASME B18.21.1 Internal-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through internal tooth design that bites into mating surfaces, preventing screw loosening under dynamic loads
• Exceptional corrosion resistance with 400 Series Stainless Steel construction, ideal for harsh industrial environments
• Optimized dimensional accuracy with 0.64" ID and 1.071" OD ensuring perfect fit for 5/8" screw applications
• Enhanced durability and wear resistance from Rockwell C34 hardness, maintaining locking performance through repeated use
• Reliable compliance with industry standards including ASME B18.21.1 for consistent quality and performance
• Environmental regulatory compliance meeting RoHS 3 and REACH requirements for safe industrial use
• Precision thickness control between 0.042-0.050" for consistent clamping force and reliable fastening performance

Professional Applications & Engineering Value

These internal tooth lock washers deliver critical vibration-resistant fastening solutions for demanding industrial applications. The 400 Series Stainless Steel construction provides excellent corrosion resistance in challenging environments while maintaining the necessary hardness for reliable performance. The internal tooth configuration ensures maximum biting action into both the screw head and workpiece surface, creating a mechanical lock that prevents rotation and loosening under vibration, thermal cycling, and dynamic loads. Engineered specifically for 5/8" screw applications, these washers solve common fastening failures in heavy machinery, automotive assemblies, construction equipment, and industrial manufacturing where vibration-induced loosening compromises safety and operational integrity. The precise dimensional control and material properties ensure consistent performance in critical mechanical fastening systems.

Specification Summary & Compliance

This tooth lock washer features precise dimensional specifications including 0.64" internal diameter, 1.071" outer diameter, and thickness ranging from 0.042" to 0.050". Manufactured from 400 Series Stainless Steel with Rockwell C34 hardness, the washer meets ASME B18.21.1 standards for dimensional accuracy and performance requirements. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory adherence for industrial applications. Designed for use with 5/8" screws in inch measurement systems, these internal tooth washers provide reliable locking performance in accordance with industry specifications.