S-97775A513 0.576" ID x 0.985" OD ASME B18.21.1; MS35335-66 Mil. Spec. External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with external teeth that bite into mating surfaces to prevent loosening under dynamic loads
• Enhanced durability from 410 Stainless Steel construction providing excellent corrosion resistance in industrial environments
• Consistent performance maintained through Rockwell C40 hardness for reliable spring action and tooth engagement
• Precision dimensional fit with 0.576" ID specifically engineered for 9/16" screw applications
• Industry-standard compliance meeting ASME B18.21.1 and MS35335-66 specifications for quality assurance
• Environmental responsibility with RoHS 3 and REACH compliance for safe use in regulated industries
• Optimized thickness range (0.037-0.045") ensuring proper compression and locking force distribution

Professional Applications & Engineering Value

This external tooth lock washer delivers exceptional vibration resistance in demanding industrial applications where secure fastening is critical. Engineered from 410 Stainless Steel, it maintains integrity in corrosive environments while the external tooth configuration provides superior biting action against both the fastener and workpiece. The Rockwell C40 hardness ensures consistent spring performance, preventing relaxation under sustained vibration. Ideal for heavy machinery, automotive assemblies, and industrial equipment, this precision washer solves common loosening problems in high-vibration scenarios. The inch system compatibility and specific 9/16" screw sizing make it perfect for maintenance and OEM applications requiring reliable locking performance without compromising on material quality or regulatory compliance.

Specification Summary & Compliance

This external tooth lock washer features precise dimensional specifications including 0.576" ID, 0.985" OD, and thickness range of 0.037-0.045". Manufactured to ASME B18.21.1 and MS35335-66 standards, it ensures proper tooth configuration and performance characteristics. The washer is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant (updated 06/14/2023, 235 SVHC), meeting current environmental regulations for industrial components. The inch system measurement and specific design for 9/16" screw applications guarantee proper fit and function in standard fastening systems.