S-91757A105 0.168" ID x 0.34" OD ASME B18.21.1 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 dynamic loads
• Excellent corrosion resistance from 18-8 stainless steel construction for long-term reliability in harsh environments
• Precision dimensional fit with 0.168" ID specifically engineered for No. 8 screws to ensure proper installation and performance
• Optimized load distribution through 0.34" OD design that spreads clamping force effectively across fastened surfaces
• Consistent performance assurance through compliance with rigorous ASME B18.21.1 manufacturing standards
• Environmental compliance ready with full RoHS 3 and REACH certification for global industrial applications
• Reliable thin-profile design with 0.018-0.023" thickness that maintains secure locking without adding bulk

Professional Applications & Engineering Value

These internal tooth lock washers deliver critical vibration resistance in demanding industrial applications where fastener security is paramount. The 18-8 stainless steel construction provides exceptional corrosion resistance for outdoor equipment, marine components, and chemical processing machinery. The precisely positioned internal teeth create multiple biting points that dig into both the screw head and workpiece surface, maintaining clamp force where standard flat washers fail. This design solves the common industrial problem of joint loosening in vibrating machinery, electrical enclosures, and automotive assemblies. The ASME B18.21.1 certification ensures dimensional consistency and performance reliability for No. 8 screw applications across manufacturing, aerospace, and heavy equipment sectors where vibration-induced failures can lead to costly downtime.

Specification Summary & Compliance

Manufactured to ASME B18.21.1 standards with precise dimensional specifications: 0.168" internal diameter, 0.34" outer diameter, and 0.018-0.023" thickness range. These internal tooth lock washers feature inch measurements and are specifically designed for No. 8 screw sizes. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and global market acceptance. The 18-8 stainless steel material provides consistent performance without hardness rating requirements, making these washers suitable for various industrial applications where corrosion resistance and vibration prevention are critical.