S-96551A190 0.089" ID x 0.2" OD ASME B18.21.1; MS35333-35; NASM35333 Mil. Spec. Internal-Tooth Lock Washers
Mil. Spec. Internal-Tooth Lock Washers
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Basic Information
Dimension Parameters
Material & Strength Parameters
Installation & Application Parameters
Special Type Parameters
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Key Features & Benefits at a Glance
- Superior vibration resistance with internal teeth that maintain consistent locking force under dynamic loads
- Corrosion-resistant cadmium plating extends service life in harsh industrial environments
- Precision-engineered dimensions (0.089" ID × 0.2" OD) ensure perfect fit for No. 2 screws
- Exceptional material hardness (Rockwell C40-50) prevents deformation under high stress conditions
- Multi-standard compliance guarantees interchangeability and reliability across ASME, MS, and NASM applications
- Optimized thickness range (0.010-0.015") provides ideal spring tension while accommodating surface variations
- Internal tooth configuration concentrates locking force directly on fastener for maximum joint security
Professional Applications & Engineering Value
Engineered for critical vibration management, these cadmium-plated steel tooth lock washers solve persistent loosening issues in industrial machinery, aerospace assemblies, and heavy equipment. The internal tooth design creates multiple biting points that dig into both bearing surface and fastener head, maintaining clamp load where standard washers fail. With Rockwell C40-50 hardness, they resist embedding and permanent set in soft materials while the cadmium plating provides sacrificial corrosion protection. These ASME B18.21.1 certified washers deliver predictable performance in high-cycle applications where vibration-induced failure isn't an option.
Specification Summary & Compliance
Manufactured to ASME B18.21.1, MS35333-35, and NASM35333 specifications with dimensional tolerances maintained throughout production. The 0.089" internal diameter and 0.2" outer diameter provide precise No. 2 screw compatibility, while the 0.010-0.015" thickness range ensures consistent performance. Compliant with RoHS and REACH environmental standards, these internal tooth lock washers meet rigorous industrial and military-grade requirements for reliability and safety.
