S-91114A011 0.195" ID x 0.41" OD ASME B18.21.1 External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through external teeth that bite into mating surfaces, preventing loosening under dynamic loads
• Enhanced corrosion protection with zinc-plated steel construction for extended service life in industrial environments
• Consistent locking performance maintained by Rockwell C40 hardness, ensuring reliable fastening integrity
• Precision dimensional control with 0.195" ID and 0.41" OD for perfect fit with No. 10 screws
• Industry-standard compliance meeting ASME B18.21.1 specifications for guaranteed quality and interchangeability
• Environmental responsibility through RoHS 3 and REACH compliance, safe for regulated applications
• Optimized thickness range (0.018-0.024") providing ideal spring tension without compromising assembly space

Professional Applications & Engineering Value

These external tooth lock washers deliver critical vibration-dampening performance for demanding industrial applications where fastener security is paramount. The zinc-plated steel construction provides essential corrosion resistance while maintaining the mechanical strength needed for heavy machinery, automotive assemblies, and electrical enclosures. The strategically positioned external teeth create maximum surface bite, effectively preventing rotational loosening in high-vibration environments that commonly plague manufacturing equipment and transportation systems. Engineered to ASME B18.21.1 standards, these washers ensure reliable performance in critical fastening joints where failure is not an option, making them ideal for maintenance, repair, and OEM applications requiring certified components.

Specification Summary & Compliance

This external tooth lock washer features precise dimensional specifications including 0.195" inner diameter, 0.41" outer diameter, and thickness ranging 0.018-0.024" for No. 10 screw applications. Manufactured to ASME B18.21.1 mechanical standards with Rockwell C40 hardness ensuring consistent performance. The product maintains full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial markets with strict material restrictions.