S-91150A114 0.384" ID x 0.747" OD ASME B18.21.1 Internal-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with internal tooth design that bites into mating surfaces to prevent loosening under dynamic loads
• Exceptional durability with Rockwell C44 hardness rating for long service life in demanding applications
• Heavy-duty performance backed by Grade 8 strength classification for high-stress industrial environments
• Corrosion protection through zinc plating that extends component lifespan in various operating conditions
• Precise dimensional fit with 0.384" ID specifically engineered for 3/8" screw applications
• Reliable compliance meeting ASME B18.21.1 standards for consistent quality and performance
• Environmental responsibility with RoHS 3 and REACH compliance for sustainable procurement

Professional Applications & Engineering Value

These Grade 8 zinc-plated steel tooth lock washers deliver critical vibration resistance in heavy machinery, automotive assemblies, and structural applications where 3/8" fasteners experience constant stress. The internal tooth location creates multiple biting points that dig into both the fastener and surface, creating mechanical interference that counters rotational forces. This design eliminates the need for additional locking mechanisms while maintaining Rockwell C44 hardness to prevent deformation under extreme clamping pressures. The zinc-plated steel construction provides sacrificial corrosion protection, making these industrial washers suitable for outdoor equipment and manufacturing environments where moisture and chemicals are present. Engineered to ASME B18.21.1 specifications, they ensure reliable performance in critical joints where fastener failure could lead to equipment damage or safety hazards.

Specification Summary & Compliance

This tooth lock washer features precise dimensional specifications including 0.384" inner diameter, 0.747" outer diameter, and 0.040-0.050" thickness range. Manufactured to ASME B18.21.1 standards for inch system fasteners, these components maintain consistent quality and performance characteristics. The product is fully compliant with RoHS 3 (2015/863/EU) regulations and REACH (EC 1907/2006) requirements, meeting environmental and safety standards for industrial use across global markets.