S-91812A227 0.21" ID x 0.35" 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, 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, ensuring long service life and reliable performance.
• Versatile compatibility with both inch (No. 10) and metric (M5) screw sizes, simplifying inventory for global operations.
• Secure locking action from the wedge lock design, which increases clamping force as vibration occurs, maintaining joint integrity.
• Compliance with environmental regulations, including RoHS 3 and REACH, ensuring safe use in regulated industries.
• Precise dimensional fit with ID of 0.21" and OD of 0.35", providing consistent installation and optimal load distribution.

Professional Applications & Engineering Value

This 316 stainless steel wedge lock washer is engineered to solve critical issues in high-vibration and corrosive industrial settings. The top and bottom serration design ensures that the washer grips firmly to both the bolt and surface, effectively resisting loosening caused by machinery vibrations or thermal cycling. Made from 316 stainless steel, it offers excellent resistance to chlorides and acids, making it suitable for offshore, chemical processing, and food industry applications where corrosion can compromise safety. The case hardened treatment to Rockwell C51 enhances surface hardness without sacrificing the material's inherent toughness, reducing wear and extending the lifespan of bolted connections. By integrating dual serrations and robust material properties, this washer delivers reliable locking performance that minimizes maintenance downtime and ensures operational reliability in demanding environments.

Specification Summary & Compliance

This washer features precise dimensions with an ID of 0.21", OD of 0.35", and thickness ranging from 0.080" to 0.100", designed for screw sizes No. 10 and M5. It is manufactured with case hardening to achieve a hardness of Rockwell C51, ensuring consistent performance. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to environmental and safety standards for industrial use.