S-98449A031 0.384" ID x 0.692" 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 loosening under dynamic loads
• Exceptional corrosion resistance with 400 Series Stainless Steel construction for long-lasting performance in harsh industrial environments
• Optimized hardness rating of Rockwell C34 ensures consistent spring tension and reliable locking performance throughout service life
• Precision dimensional control with 0.384" ID and 0.692" OD for perfect fit with 3/8" fasteners in critical assemblies
• Industry-standard compliance with ASME B18.21.1 specifications guarantees consistent quality and interchangeability
• Environmental regulation adherence with RoHS 3 and REACH compliance for global market acceptance and safety
• Internal tooth configuration provides concentrated locking force while protecting visible surfaces from damage

Professional Applications & Engineering Value

This 400 Series Stainless Steel tooth lock washer delivers critical vibration resistance in demanding industrial applications where fastener security is paramount. The internal tooth design creates multiple biting points that dig into both the fastener and mounting surface, creating a mechanical lock that withstands severe vibration and thermal cycling. Engineered to ASME B18.21.1 standards, this washer maintains consistent performance in machinery, automotive, and heavy equipment applications where traditional flat washers fail. The stainless steel construction combined with Rockwell C34 hardness ensures the teeth maintain their biting capability without deformation, providing reliable locking action throughout the component's service life in corrosive or high-temperature environments.

Specification Summary & Compliance

This tooth lock washer features precision dimensions with 0.384" internal diameter, 0.692" outer diameter, and thickness ranging 0.032-0.040" specifically designed for 3/8" screw applications. Manufactured to ASME B18.21.1 specifications with internal tooth configuration, it ensures proper locking performance and dimensional consistency. The component is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant (updated 06/14/2023, 235 SVHC), meeting international environmental and safety standards for industrial use across global markets.