S-96551A220 0.168" ID x 0.34" OD ASME B18.21.1; MS35333-38; 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 extreme dynamic loads
• Enhanced corrosion protection through cadmium plating that extends service life in demanding industrial environments
• Consistent performance maintained by Rockwell C40-50 hardness rating ensuring dimensional stability under pressure
• Precise fitment with 0.168" ID and 0.34" OD dimensions engineered for No. 8 screws to prevent assembly issues
• Rigorous quality assurance through compliance with ASME B18.21.1, MS35333-38, and NASM35333 specifications
• Optimal tooth engagement with internal tooth configuration that maximizes surface contact while minimizing part damage
• Durable steel construction providing reliable performance across temperature variations and mechanical stress conditions

Professional Applications & Engineering Value

These internal tooth lock washers deliver critical vibration resistance in high-stress assemblies where fastener security is paramount. The cadmium-plated steel construction combines corrosion protection with mechanical strength, making these No. 8 washers ideal for automotive, aerospace, and heavy machinery applications where environmental factors and dynamic loads threaten joint integrity. The precisely engineered teeth create multiple biting points that resist rotational forces and maintain clamp load, effectively solving common loosening problems in industrial washers applications. With compliance to multiple military and industrial standards, these components provide engineering teams with reliable, specification-backed solutions for critical fastening systems requiring ASME B18.21.1 certification and beyond.

Specification Summary & Compliance

Manufactured to exacting dimensional tolerances with 0.168" internal diameter and 0.34" outer diameter, these tooth lock washers maintain precise Class 2A thread compatibility. The components strictly adhere to ASME B18.21.1 standards while also meeting MS35333-38 and NASM35333 military specifications for quality assurance. The internal tooth configuration ensures optimal engagement while the cadmium plating provides surface protection compliant with industrial requirements. These inch-system washers deliver consistent performance across applications demanding certified vibration-resistant fastening solutions.