S-91233A112 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, preventing loosening under dynamic loads
• Enhanced durability through Rockwell C40 hardness, maintaining tooth integrity through repeated installation cycles
• Corrosion-resistant black oxide finish provides protection against rust in demanding industrial environments
• Precision dimensional control with 0.141" ID specifically engineered for No. 6 screw applications
• Industry-standard compliance with ASME B18.21.1 ensures reliable performance and interchangeability
• Environmental responsibility through RoHS 3 and REACH compliance for sustainable manufacturing
• Optimized tooth geometry with external placement for maximum gripping action without damaging soft materials

Professional Applications & Engineering Value

This Black Oxide Steel External Tooth Lock Washer delivers exceptional vibration resistance in critical fastening applications where maintaining clamp load is essential. The external tooth configuration creates multiple biting points that dig into both the fastener head and mounting surface, effectively resisting rotational forces in high-vibration environments like machinery, automotive assemblies, and electrical enclosures. The Rockwell C40 hardness ensures the teeth maintain their sharpness and locking capability through multiple installation cycles, while the black oxide surface treatment provides corrosion protection without significantly altering dimensional tolerances. Engineered specifically for No. 6 screw applications, this washer solves common loosening problems in assembly operations where thermal cycling, mechanical stress, or vibration could compromise joint integrity.

Specification Summary & Compliance

This external tooth lock washer features precise dimensional specifications including 0.141" internal diameter, 0.32" outer diameter, and thickness ranging from 0.016" to 0.022". Manufactured to ASME B18.21.1 standards for dimensional accuracy and performance requirements. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and workplace safety. The Rockwell C40 hardness rating guarantees consistent mechanical properties and reliable locking performance across industrial applications.