S-95795A030 0.384" ID x 0.985" OD ASME B18.21.1 Internal / External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Maximum vibration resistance with dual internal/external teeth design that bites into mating surfaces to prevent loosening under dynamic loads
• Enhanced corrosion protection through zinc-plated steel construction for extended service life in demanding industrial environments
• Superior mechanical strength with Rockwell C40 hardness rating ensuring consistent performance under high torque applications
• Precision dimensional control with 0.384" ID and 0.985" OD providing exact fit for 3/8" screw applications
• Industry-standard compliance meeting ASME B18.21.1 specifications for reliable performance in critical assemblies
• Environmental responsibility with RoHS 3 and REACH compliance for safe use in regulated industries
• Optimized thickness range (0.037-0.041") ensuring proper compression and spring action for secure locking performance

Professional Applications & Engineering Value

This heavy-duty tooth lock washer delivers exceptional engineering value in applications where vibration-induced loosening compromises assembly integrity. The unique internal/external teeth configuration creates multiple biting points that dig into both the fastener and workpiece surfaces, effectively resisting rotational forces in high-vibration environments such as automotive assemblies, industrial machinery, and power transmission systems. Manufactured from zinc-plated steel with controlled Rockwell C40 hardness, this washer maintains its spring properties while providing superior corrosion resistance. The precision-engineered dimensions ensure perfect compatibility with 3/8" fasteners, making it an ideal solution for maintenance, repair, and OEM applications requiring reliable, long-term fastening security in inch-system assemblies.

Specification Summary & Compliance

This tooth lock washer features precise dimensional specifications including 0.384" internal diameter, 0.985" outer diameter, and thickness ranging from 0.037" to 0.041". Manufactured to ASME B18.21.1 standards for mechanical fasteners, it ensures consistent quality and performance in industrial applications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting the latest environmental and safety requirements for industrial components. The combination of inch system measurements and standardized compliance makes this washer suitable for global industrial applications requiring reliable locking performance.