S-91114A007 0.141" ID x 0.32" OD ASME B18.21.1 External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with external teeth that bite into mating surfaces to prevent loosening under dynamic loads
• Enhanced corrosion protection through zinc-plated steel construction for extended service life in industrial environments
• Precision dimensional compatibility with 0.141" ID specifically engineered for No. 6 screws with 0.32" OD for optimal coverage
• Exceptional hardness durability with Rockwell C40 rating maintaining tooth integrity through repeated assembly cycles
• Industry-standard compliance meeting ASME B18.21.1 specifications for reliable performance in critical applications
• Environmental regulation adherence with RoHS 3 and REACH compliance for global manufacturing compatibility
• Optimized external tooth placement providing maximum surface contact and superior locking action compared to internal tooth designs

Professional Applications & Engineering Value

This external tooth lock washer solves critical vibration-induced fastener failure in demanding industrial applications. The zinc-plated steel construction provides essential corrosion resistance while the precisely positioned external teeth create multiple biting points that dig into both the fastener head and mounting surface. This design is particularly valuable in vibration-prone equipment such as motors, pumps, and machinery where constant motion can cause standard washers to fail. The Rockwell C40 hardness ensures the teeth maintain their aggressive bite through multiple installation cycles without deformation. Engineered specifically for No. 6 screws with 0.141" ID and 0.32" OD, this washer delivers reliable locking performance in electrical enclosures, automotive assemblies, and industrial equipment where vibration resistance is critical to operational safety and maintenance reduction.

Specification Summary & Compliance

This external tooth lock washer features precise dimensional specifications including 0.141" internal diameter, 0.32" outer diameter, and thickness ranging 0.016-0.022". Manufactured to ASME B18.21.1 standards for tooth lock washers, it ensures consistent performance and interchangeability. The product maintains full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting the latest environmental requirements for hazardous substance restrictions. The inch system measurement and external tooth location provide optimal compatibility with standard industrial fastener systems.