S-96551A160 0.64" ID x 1.071" OD ASME B18.21.1; MS35333-80; NASM35333 Mil. Spec. Internal-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with internal tooth design that bites into mating surfaces to prevent loosening under dynamic loads
• Exceptional corrosion resistance from 410 stainless steel construction, ideal for harsh industrial environments
• Optimized for 5/8" fasteners with precise 0.64" ID and 1.071" OD dimensions for perfect fit and maximum contact area
• Enhanced durability with Rockwell C40-50 hardness rating that maintains tooth integrity through repeated installation cycles
• Reliable compliance meeting ASME B18.21.1, MS35333-80, and NASM35333 standards for consistent quality and performance
• Environmental safety with RoHS 3 and REACH compliance, ensuring no hazardous substances in your assembly
• Consistent thickness control (0.042-0.050") for uniform clamping force and reliable joint integrity

Professional Applications & Engineering Value

This 5/8" tooth lock washer delivers critical anti-vibration performance for demanding industrial applications where joint integrity is paramount. The internal tooth configuration provides superior biting action that prevents rotational loosening in high-vibration environments such as heavy machinery, automotive assemblies, and construction equipment. Manufactured from 410 stainless steel, this washer offers excellent corrosion resistance while maintaining the mechanical strength needed for heavy-duty fastening systems. The precision-engineered teeth and controlled thickness ensure consistent performance across multiple installations, making it ideal for maintenance-critical applications where reliability cannot be compromised. Engineered to meet rigorous military and industrial specifications, this internal tooth lock washer provides a cost-effective solution for preventing catastrophic fastener failure in critical assemblies.

Specification Summary & Compliance

This tooth lock washer features inch system dimensions with 0.64" internal diameter, 1.071" outer diameter, and controlled thickness between 0.042-0.050". Manufactured to exacting ASME B18.21.1 standards with additional compliance to MS35333-80 and NASM35333 specifications. The washer demonstrates full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors. The internal tooth design and Rockwell C40-50 hardness provide reliable performance in accordance with established mechanical fastener standards for vibration-resistant applications.