S-96551A330 1.26" ID x 1.95" OD ASME B18.21.1; MS35333-51; NASM35333 Mil. Spec. Internal-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with internal teeth that bite into mating surfaces to prevent loosening under dynamic loads
• Exceptional corrosion protection through cadmium plating that extends service life in demanding industrial environments
• Precision dimensional compatibility with 1.26" ID specifically engineered for 1 1/4" screw applications
• Enhanced load distribution with 1.95" OD providing broader surface contact for improved joint integrity
• Optimized mechanical strength with Rockwell C40-50 hardness ensuring consistent performance under high stress conditions
• Guaranteed interchangeability through compliance with ASME B18.21.1, MS35333-51, and NASM35333 standards
• Reliable torque retention with controlled thickness (0.059-0.067") maintaining consistent clamping force

Professional Applications & Engineering Value

This internal tooth lock washer delivers critical vibration-resistant fastening solutions for heavy machinery, automotive assemblies, and structural applications where dynamic loads threaten joint integrity. The cadmium-plated steel construction provides essential corrosion resistance while maintaining the mechanical properties needed for high-stress environments. The precisely positioned internal teeth create multiple biting points that dig into both the fastener and workpiece surfaces, effectively resisting rotational forces and preventing catastrophic loosening. Engineered to ASME B18.21.1 specifications, this washer ensures reliable performance in critical assemblies where safety and reliability are paramount, making it ideal for aerospace, defense, and industrial equipment applications requiring certified components.

Specification Summary & Compliance

This internal tooth lock washer features inch system dimensions with 1.26" internal diameter, 1.95" outer diameter, and controlled thickness between 0.059-0.067". Manufactured from cadmium-plated steel with Rockwell C40-50 hardness, the component meets ASME B18.21.1 dimensional and performance requirements, along with military specifications MS35333-51 and NASM35333. The internal tooth configuration provides superior locking action while maintaining compliance with industry standards for reliable performance in critical fastening applications.