S-91114A032 0.448" ID x 0.76" 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 corrosion protection from zinc plating, extending service life in demanding industrial environments
• Reliable hardness performance with Rockwell C40 rating ensuring teeth maintain grip without deforming under pressure
• Precise dimensional fit with 0.448" ID and 0.76" OD designed for secure fastening on 7/16" screws
• Industry-standard compliance with ASME B18.21.1 specifications guaranteeing consistent quality and interchangeability
• Environmental responsibility through RoHS 3 and REACH compliance, meeting strict regulatory requirements
• Optimized thickness range (0.032-0.040") providing ideal compression and spring action for lasting tension

Professional Applications & Engineering Value

This zinc-plated steel tooth lock washer delivers critical vibration-resistant performance in demanding industrial applications where secure fastening is non-negotiable. The external teeth design creates multiple biting points that dig into both the bearing surface and fastener head, effectively resisting rotational loosening caused by machinery vibration, thermal cycling, and dynamic loads. Made from steel with Rockwell C40 hardness, these washers maintain their locking action without tooth deformation, even under high clamping forces. The zinc plating provides sacrificial corrosion protection, making them suitable for outdoor equipment, automotive assemblies, and manufacturing machinery where environmental exposure is a concern. Engineered to ASME B18.21.1 standards, these washers ensure reliable performance in critical joints while meeting regulatory requirements for industrial safety.

Specification Summary & Compliance

This tooth lock washer features precise dimensions with 0.448" inner diameter, 0.76" outer diameter, and thickness ranging 0.032-0.040" for optimal compression. Manufactured to ASME B18.21.1 specifications for dimensional accuracy and performance requirements. The washer demonstrates full compliance with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations regarding chemical safety, with current compliance maintained through January 17, 2023, covering 233 Substances of Very High Concern (SVHC).