S-95584A319 0.384" ID x 0.694" OD ASME B18.21.1 External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with external tooth design that maintains consistent locking force under dynamic loads
• Exceptional corrosion protection through Black Oxide coating on 18-8 stainless steel for harsh industrial environments
• Optimized dimensional precision with 0.384" ID and 0.694" OD ensuring perfect fit for 3/8" fasteners
• Enhanced durability with Rockwell B88 hardness providing reliable performance in high-stress applications
• Industry-standard compliance meeting ASME B18.21.1 specifications for quality assurance
• Environmental responsibility with full RoHS 3 and REACH compliance for sustainable manufacturing
• Consistent thickness control between 0.032-0.040" for uniform load distribution and seating

Professional Applications & Engineering Value

This 3/8" external tooth lock washer delivers critical vibration-resistant performance in demanding industrial applications where fastener security is paramount. The Black Oxide 18-8 Stainless Steel construction provides excellent corrosion resistance while maintaining the material's inherent strength, making it ideal for automotive assemblies, heavy machinery, and outdoor equipment exposed to environmental elements. The external tooth configuration bites into both the bearing surface and fastener head, creating a mechanical lock that prevents loosening from vibration and thermal cycling. Engineered to ASME B18.21.1 standards, this washer ensures reliable performance in high-stress environments where traditional flat washers fail, significantly reducing maintenance frequency and improving operational safety in critical bolted joints.

Specification Summary & Compliance

This precision tooth lock washer features dimensional accuracy with 0.384" internal diameter, 0.694" outer diameter, and thickness range of 0.032-0.040" specifically designed for 3/8" screw applications. Manufactured in compliance with ASME B18.21.1 standards for dimensional and mechanical requirements. The product meets RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) regulations (updated 06/10/2022, 224 SVHC), ensuring environmental responsibility and material safety in industrial applications worldwide.