S-93419A111 0.576" ID x 0.985" OD ASME B18.21.1 External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with external teeth design that bites into mating surfaces to prevent loosening under dynamic loads
• Exceptional durability provided by 410 stainless steel construction with Rockwell C34 hardness for long service life
• Precise dimensional fit with 0.576" ID and 0.985" OD ensuring proper installation on 9/16" fasteners
• Industry-standard compliance meeting ASME B18.21.1 specifications for reliable performance
• Environmental regulation adherence with RoHS 3 and REACH compliance for safe use in regulated industries
• Consistent thickness control between 0.037-0.045" for uniform clamping force distribution
• External tooth configuration providing maximum locking action while minimizing surface damage

Professional Applications & Engineering Value

These 9/16" external tooth lock washers deliver critical vibration resistance in demanding mechanical systems where fastener security is paramount. Engineered from 410 stainless steel with Rockwell C34 hardness, these washers maintain their locking capability even under extreme stress conditions. The external tooth design creates positive mechanical interference that prevents rotational loosening in high-vibration environments such as heavy machinery, automotive assemblies, and industrial equipment. Unlike standard flat washers, these tooth lock washers provide reliable performance in applications subject to thermal cycling, mechanical shocks, and continuous operation. The combination of ASME B18.21.1 compliance and premium stainless steel construction ensures consistent performance across manufacturing, construction, and maintenance applications where fastener failure is not an option.

Specification Summary & Compliance

This tooth lock washer features precise dimensional specifications including 0.576" internal diameter, 0.985" outer diameter, and thickness ranging from 0.037" to 0.045" for optimal performance with 9/16" fasteners. Manufactured in compliance with ASME B18.21.1 standards for dimensional accuracy and mechanical properties. The product meets RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and workplace safety. The 410 stainless steel construction with Rockwell C34 hardness provides consistent mechanical properties and corrosion resistance suitable for industrial applications.