S-98449A033 0.512" ID x 0.9" OD ASME B18.21.1 Internal-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with internal teeth design that maintains consistent locking force under dynamic loads
• Exceptional corrosion resistance through 400 Series Stainless Steel construction for long-term reliability in harsh environments
• Optimized dimensional stability with precise 0.512" ID and 0.9" OD ensuring perfect fit for 1/2" fasteners
• Enhanced mechanical durability with Rockwell C34 hardness providing excellent wear resistance and deformation prevention
• Industry-standard compliance meeting ASME B18.21.1 specifications for consistent performance and interchangeability
• Environmental responsibility through RoHS 3 and REACH compliance, ensuring safe use in regulated applications
• Reliable torque retention with controlled thickness (0.037-0.045") for consistent spring action and locking performance

Professional Applications & Engineering Value

This internal tooth lock washer delivers critical vibration-resistant performance in demanding industrial applications where fastener loosening poses significant operational risks. Engineered from 400 Series Stainless Steel, it provides excellent corrosion resistance for outdoor equipment, marine components, and chemical processing machinery. The precision-formed internal teeth create multiple biting points that dig into both bearing surface and fastener head, effectively preventing rotational movement under extreme vibration and thermal cycling. This design solves common assembly failures in heavy machinery, automotive systems, and power transmission equipment where traditional flat washers prove inadequate. The combination of Rockwell C34 hardness and controlled thickness ensures consistent spring tension while maintaining material integrity through repeated loading cycles, making it ideal for permanent installations requiring maintenance-free operation.

Specification Summary & Compliance

This precision tooth lock washer features dimensional accuracy per ASME B18.21.1 standards with 0.512" internal diameter, 0.9" outer diameter, and thickness ranging 0.037-0.045". Manufactured from 400 Series Stainless Steel with internal tooth configuration, it maintains compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations. The component meets all mechanical and dimensional requirements specified in ASME B18.21.1 for tooth lock washers, ensuring reliable performance in industrial fastener applications requiring certified components.