S-91114A033 0.513" ID x 0.9" 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 harsh environments
• Precision dimensional control with 0.513" ID and 0.9" OD ensuring perfect fit for 1/2" fasteners
• Exceptional mechanical strength with Rockwell C40 hardness maintaining tooth integrity under high clamping forces
• Industry-standard compliance with ASME B18.21.1 specifications guaranteeing reliable performance
• Environmental responsibility through RoHS 3 and REACH compliance for safe industrial usage
• Optimized thickness range (0.037-0.045") providing consistent spring action while accommodating surface variations

Professional Applications & Engineering Value

This heavy-duty tooth lock washer delivers critical vibration resistance in demanding industrial applications where fastener security is paramount. The external tooth configuration creates multiple biting points that dig into both the fastener head and base material, effectively preventing rotational loosening in high-vibration environments like heavy machinery, automotive assemblies, and structural steel connections. Manufactured from zinc-plated steel, it offers superior corrosion resistance while maintaining the necessary spring tension to keep bolted joints secure. The combination of Rockwell C40 hardness and precise dimensional control ensures the teeth maintain their biting capability without deformation, even under extreme cyclic loading conditions common in manufacturing equipment and transportation infrastructure.

Specification Summary & Compliance

This 1/2" tooth lock washer features inch system dimensions with 0.513" internal diameter, 0.9" external diameter, and thickness ranging 0.037-0.045". Manufactured to ASME B18.21.1 standards with external tooth configuration, it ensures dimensional precision and reliable locking performance. The washer is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting the latest environmental and safety requirements for industrial components.