S-91113A003 0.089" ID x 0.2" OD ASME B18.21.1 Internal-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through internal tooth design that bites into mating surfaces to prevent 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 C44 hardness rating ensuring teeth retain their bite force
• Precise fit for No. 2 screws with 0.089" internal diameter providing secure fastening in compact assemblies
• Reliable compliance with ASME B18.21.1 standards guaranteeing dimensional accuracy and performance consistency
• Environmental responsibility through RoHS 3 and REACH compliance for safe use in regulated industries
• Optimized space utilization with compact 0.2" OD and 0.010-0.016" thickness profile for tight clearance applications

Professional Applications & Engineering Value

These internal tooth lock washers provide critical vibration resistance in precision assemblies where space constraints and reliability are paramount. The zinc-plated steel construction offers excellent corrosion resistance while maintaining the mechanical strength needed for demanding industrial environments. The internal tooth location ensures maximum biting action directly against the screw head or nut surface, creating superior locking force that prevents back-off in high-vibration applications such as electrical enclosures, precision instruments, and small machinery. Engineered specifically for No. 2 screw size applications, these washers deliver reliable performance in compact assemblies where traditional locking methods may be impractical. The combination of Rockwell C44 hardness and precise tooth geometry ensures consistent performance across thousands of cycles, making them ideal for maintenance-critical applications where fastener failure is not an option.

Specification Summary & Compliance

This tooth lock washer features dimensional specifications of 0.089" ID, 0.2" OD, and thickness ranging from 0.010-0.016" with internal tooth location. Manufactured to ASME B18.21.1 standards, these washers ensure precise dimensional tolerances and performance characteristics. The product 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. The zinc-plated steel material and Rockwell C44 hardness rating provide consistent mechanical properties and reliable performance in demanding applications.