S-96551A250 0.332" ID x 0.61" OD ASME B18.21.1; MS35333-41; 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 fastener loosening under dynamic loads
• Enhanced corrosion protection through cadmium plating that provides durable surface coverage in demanding industrial environments
• Consistent performance with Rockwell C40-50 hardness ensuring optimal spring tension and long-term reliability
• Precision dimensional fit with 0.332" ID and 0.61" OD engineered for perfect compatibility with 5/16" fasteners
• Industry-standard compliance meeting ASME B18.21.1, MS35333-41, and NASM35333 specifications for quality assurance
• Optimized thickness range (0.028-0.034") providing reliable compression and secure locking action
• Heavy-duty construction in inch system measurement for seamless integration with existing industrial equipment

Professional Applications & Engineering Value

This 5/16" internal tooth lock washer delivers exceptional engineering value in applications where vibration-induced fastener failure is a critical concern. The cadmium-plated steel construction provides superior corrosion resistance while maintaining the necessary Rockwell C40-50 hardness for consistent spring performance. The internal tooth configuration creates multiple biting points that dig into both the fastener and mating surface, effectively resisting rotational forces in high-vibration environments such as heavy machinery, automotive assemblies, and industrial equipment. By meeting ASME B18.21.1, MS35333-41, and NASM35333 standards, this washer ensures reliable performance in critical fastener systems where security and vibration resistance are paramount.

Specification Summary & Compliance

This precision internal tooth lock washer features dimensional specifications including 0.332" inner diameter, 0.61" outer diameter, and thickness range of 0.028-0.034" specifically designed for 5/16" screw applications. Manufactured to exacting ASME B18.21.1 standards with additional compliance to MS35333-41 and NASM35333 military specifications. The cadmium-plated steel construction meets industry requirements for corrosion resistance while the Rockwell C40-50 hardness ensures proper spring characteristics and durability in demanding industrial environments.