S-91074A289 0.51" ID x 1" OD Extreme-Vibration-Resistant Wedge Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through dual-sided serrations that bite into mating surfaces to prevent loosening under dynamic loads
• Enhanced corrosion protection with zinc-flake coating that provides excellent resistance to harsh industrial environments
• Exceptional durability with Rockwell C46 hardness rating ensuring long-term performance in heavy-duty applications
• Precise metric sizing with 0.51" ID and 1" OD dimensions for perfect fit with M12 fasteners in metric assemblies
• Reliable locking action from wedge lock design that maintains clamping force even under extreme vibration conditions
• Environmental compliance meeting RoHS 3 and REACH regulations for safe use in regulated industries
• Versatile installation with top and bottom serrations providing effective locking regardless of orientation

Professional Applications & Engineering Value

This M12 wedge lock washer delivers critical vibration resistance for demanding industrial applications where fastener integrity is paramount. The zinc-flake-coated steel construction provides superior corrosion protection, making it ideal for outdoor equipment, automotive assemblies, and machinery exposed to moisture and chemicals. The dual-sided serration design ensures maximum locking force by biting into both the fastener head and base material, effectively solving the common problem of joint loosening in high-vibration environments. With its Rockwell C46 hardness and precise metric dimensions, this washer maintains structural integrity under heavy loads while ensuring compatibility with international fastener standards. The combination of top and bottom serrations guarantees reliable performance regardless of installation orientation, providing engineering flexibility in complex assembly scenarios.

Specification Summary & Compliance

This precision-engineered wedge lock washer features metric dimensions with 0.51" inner diameter and 1" outer diameter, manufactured from high-strength steel with zinc-flake coating for corrosion resistance. The washer meets industry standards for hardness at Rockwell C46 and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors. The dual serration design provides reliable locking performance for M12 fastener applications in demanding vibration-prone environments.