S-91812A822 1.47" ID x 2.17" OD Extreme-Vibration-Resistant Wedge Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with dual top and bottom serrations that lock securely under load, preventing loosening in high-stress applications.
• Exceptional corrosion resistance due to 316 stainless steel construction, ideal for harsh, corrosive environments like marine or chemical processing.
• Enhanced durability and wear resistance from case hardening to Rockwell C51, extending service life in heavy-duty industrial use.
• Reliable performance across standards with availability in both inch (for 1 3/8" screws) and metric (for M36 screws), offering flexibility for global projects.
• Precise dimensional fit with an ID of 1.47" and OD of 2.17", ensuring optimal load distribution and stability on fastened assemblies.
• Consistent thickness control between 0.260-0.280" for uniform clamping force and reduced risk of fastener failure.
• Compliance with environmental and safety regulations, including RoHS 3 and REACH, for use in regulated industries without health or environmental concerns.

Professional Applications & Engineering Value

This 316 stainless steel wedge lock washer is engineered to solve critical issues in demanding industrial settings, such as machinery vibration, thermal cycling, and dynamic loads that cause standard fasteners to fail. The dual serrations on top and bottom bite into both the nut/bolt and mating surface, creating a mechanical lock that resists rotation and loosening over time. Made from 316 stainless steel, it offers excellent resistance to chlorides and acids, making it suitable for offshore, chemical, and food processing applications. The case hardened treatment to Rockwell C51 ensures the serrations maintain their sharpness and the washer withstands high clamp loads without deforming. Ideal for use with 1 3/8" and M36 screw sizes, this washer provides reliable performance in heavy equipment, structural assemblies, and transportation systems where safety and longevity are paramount.

Specification Summary & Compliance

This washer features precise dimensions: ID of 1.47", OD of 2.17", and thickness ranging from 0.260" to 0.280". It is designed for screw sizes 1 3/8" and M36, with serrations on both top and bottom for enhanced locking. The material is 316 stainless steel, case hardened to a hardness of Rockwell C51 for improved durability. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, ensuring it meets environmental and safety requirements for restricted substances.