S-96551A230 0.195" ID x 0.381" OD ASME B18.21.1; MS35333-39; NASM35333 Mil. Spec. 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
• Enhanced corrosion protection through cadmium plating that extends service life in demanding environments
• Exceptional hardness rating (Rockwell C40-50) ensures minimal deformation and reliable performance under high stress
• Precision dimensional control with 0.195" ID and 0.381" OD for perfect fit with No. 10 screws
• Multi-standard compliance meeting ASME B18.21.1, MS35333-39, and NASM35333 for guaranteed interchangeability
• Optimized thickness range (0.020-0.025") provides ideal spring tension while accommodating manufacturing variations
• Internal tooth configuration concentrates locking force directly on the fastener for maximum security

Professional Applications & Engineering Value

This No. 10 internal tooth lock washer delivers critical vibration resistance in high-stress assemblies where loosening could compromise safety and performance. The cadmium-plated steel construction provides excellent corrosion resistance while maintaining the Rockwell C40-50 hardness necessary for repeated disassembly and reassembly cycles. The internal tooth design creates multiple biting points that dig into both the fastener and mating surface, effectively preventing rotational movement in machinery, automotive, and aerospace applications. Engineered to meet ASME B18.21.1 and military specifications MS35333-39 and NASM35333, this washer ensures reliable performance in critical bolted joints subject to thermal cycling, vibration, and dynamic loading conditions common in industrial environments.

Specification Summary & Compliance

This precision tooth lock washer features inch system dimensions with 0.195" internal diameter and 0.381" outer diameter, manufactured to exacting thickness tolerances of 0.020-0.025". The component complies with ASME B18.21.1 mechanical standards and military specifications MS35333-39 and NASM35333, ensuring dimensional accuracy and performance reliability. Manufactured from high-grade steel with cadmium plating for corrosion protection, this washer maintains Rockwell C40-50 hardness throughout its service life, providing consistent locking performance in demanding industrial applications.