S-91757A131 0.769" ID x 1.245" OD ASME B18.21.1 Internal-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with internal tooth design prevents fastener loosening under dynamic loads
• Excellent corrosion resistance from 18-8 stainless steel construction ensures long-term reliability in harsh environments
• Precise dimensional control (0.769" ID, 1.245" OD) guarantees perfect fit for 3/4" fasteners and consistent performance
• Enhanced durability with Rockwell C40 hardness maintains tooth integrity through repeated installation cycles
• Industry-standard compliance with ASME B18.21.1 ensures mechanical reliability and interchangeability
• Environmental regulation compliance with RoHS 3 and REACH supports sustainable manufacturing practices
• Optimized tooth engagement with internal tooth location provides concentrated locking force where needed most

Professional Applications & Engineering Value

This 3/4" internal tooth lock washer delivers critical vibration resistance in demanding industrial applications where fastener security is paramount. The 18-8 stainless steel composition provides exceptional corrosion resistance, making these washers ideal for chemical processing, marine environments, and outdoor equipment where moisture and corrosive elements are concerns. The internal tooth configuration concentrates locking force directly against the fastener head, preventing rotation and maintaining clamp load in high-vibration machinery, automotive assemblies, and heavy equipment. With Rockwell C40 hardness, these washers maintain their locking teeth integrity through multiple installation cycles, reducing replacement frequency and maintenance costs. The precise dimensional control ensures consistent performance across production runs, while compliance with ASME B18.21.1 standards guarantees mechanical reliability in critical fastener systems.

Specification Summary & Compliance

This tooth lock washer features inch system dimensions with 0.769" internal diameter and 1.245" outer diameter, specifically engineered for 3/4" fasteners. Manufactured to ASME B18.21.1 specifications for mechanical performance and dimensional accuracy. The component is fully RoHS 3 (2015/863/EU) compliant and meets REACH (EC 1907/2006) requirements regarding substance restrictions, ensuring environmental regulation adherence for global industrial applications.