S-91812A429 0.28" ID x 0.53" OD Extreme-Vibration-Resistant Wedge Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with dual top and bottom serrations that bite into mating surfaces, preventing loosening under dynamic loads
• Exceptional corrosion resistance in harsh environments thanks to 316 stainless steel construction, ideal for marine and chemical applications
• Enhanced durability and wear resistance from case hardening to Rockwell C51 hardness, extending service life in high-stress applications
• Reliable locking performance for 1/4" fasteners with precise 0.28" ID and 0.53" OD dimensions ensuring proper fit and function
• Compliance with strict environmental regulations including RoHS 3 and REACH, making them suitable for global industrial supply chains
• Optimized for inch-system applications with consistent 0.080-0.100" thickness for uniform clamping force in standard assemblies

Professional Applications & Engineering Value

This 316 stainless steel wedge lock washer addresses critical vibration-induced failure points in industrial equipment, machinery, and structural assemblies. The dual serration technology on both top and bottom surfaces creates multiple biting edges that resist rotational movement, making it ideal for heavy-duty applications in transportation, manufacturing, and offshore installations where constant motion threatens joint integrity. The case hardened surface maintains serration sharpness while the 316 stainless steel core provides superior corrosion resistance against chemicals, saltwater, and extreme temperatures. This combination delivers reliable locking performance in demanding environments where maintenance access is limited and failure consequences are significant.

Specification Summary & Compliance

Manufactured to precise inch system dimensions with 0.28" inner diameter, 0.53" outer diameter, and 0.080-0.100" thickness range for consistent performance with 1/4" fasteners. The wedge lock design and dual serration pattern provide positive locking action without requiring additional components. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental responsibility and global market acceptance. Case hardening treatment achieves Rockwell C51 hardness for maintained serration effectiveness throughout the product lifecycle.