S-96551A260 0.384" ID x 0.692" OD ASME B18.21.1; MS35333-42; 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
• Enhanced corrosion protection through cadmium plating that extends service life in demanding industrial environments
• Consistent hardness performance with Rockwell C40-50 rating ensuring reliable spring action and tooth engagement
• Precision dimensional control with 0.384" ID and 0.692" OD providing exact fit for 3/8" fasteners
• Multiple specification compliance meeting ASME B18.21.1, MS35333-42, and NASM35333 standards for quality assurance
• Optimized thickness range (0.032-0.040") allowing for proper compression and spring force in assembly applications
• Reliable locking performance in inch system applications where vibration and thermal cycling are concerns

Professional Applications & Engineering Value

This 3/8" internal tooth lock washer delivers critical vibration resistance in mechanical assemblies where dynamic loads and thermal cycling threaten joint integrity. The cadmium-plated steel construction provides dual benefits: the steel core maintains Rockwell C40-50 hardness for consistent spring force, while the cadmium surface treatment offers corrosion protection in industrial environments. The internal tooth configuration concentrates locking force directly beneath the fastener head, creating positive mechanical interference that prevents back-off in high-vibration applications such as machinery, automotive systems, and heavy equipment. Engineered to ASME B18.21.1 standards with additional compliance to MS35333-42 and NASM35333 specifications, this washer ensures reliable performance in critical assemblies where fastener security is non-negotiable.

Specification Summary & Compliance

This precision tooth lock washer features exact dimensional specifications including 0.384" inner diameter, 0.692" outer diameter, and thickness ranging 0.032-0.040" for optimal compression. Manufactured to ASME B18.21.1 standards with additional compliance to MS35333-42 and NASM35333 specifications, ensuring consistent quality and performance. The internal tooth configuration provides positive locking action while the cadmium-plated steel construction meets industry requirements for corrosion resistance and mechanical properties. Suitable for inch system applications requiring reliable vibration resistance in industrial and mechanical fastening systems.