S-91812A479 0.51" ID x 1" OD Extreme-Vibration-Resistant Wedge Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through dual-sided serration technology that bites into mating surfaces to prevent loosening under extreme conditions
• Exceptional corrosion resistance with 316 stainless steel construction, ideal for harsh industrial and marine environments
• Enhanced durability and wear resistance from case hardening to Rockwell C51 hardness, maintaining locking performance through repeated use
• Precise M12 compatibility with 0.51" ID and 1" OD metric dimensions ensuring perfect fit for standard industrial fastening systems
• Reliable locking performance with optimized 0.110-0.130" thickness providing consistent clamping force without compromising assembly integrity
• Full regulatory compliance meeting RoHS 3 and REACH standards for safe use in regulated industries and global markets
• Versatile installation capability with top and bottom serrations allowing effective performance in various orientation scenarios

Professional Applications & Engineering Value

This 316 stainless steel wedge lock washer delivers critical engineering solutions where vibration-induced fastener failure poses significant operational risks. The dual serration technology creates multiple biting points that mechanically resist rotational forces, making it ideal for heavy machinery, transportation equipment, and structural applications experiencing constant dynamic loads. The case hardened construction to Rockwell C51 ensures the serrations maintain their sharp bite through numerous installation cycles, while the 316 stainless steel material provides exceptional resistance to chemical corrosion and extreme temperatures. For engineers specifying M12 fastening systems in demanding environments, this washer offers a reliable, maintenance-free locking solution that reduces downtime and prevents catastrophic equipment failure.

Specification Summary & Compliance

Manufactured to precise metric dimensions with 0.51" inner diameter, 1" outer diameter, and controlled thickness between 0.110-0.130" for consistent M12 screw compatibility. The wedge lock design features serrations on both top and bottom surfaces with case hardening treatment achieving Rockwell C51 hardness. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and unrestricted use across global industrial markets.