S-91812A251 0.13" ID x 0.28" OD Extreme-Vibration-Resistant Wedge Lock Washers
Extreme-Vibration-Resistant Wedge Lock Washers
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Basic Information
Dimension Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
Special Type Parameters
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Key Features & Benefits at a Glance
- Superior vibration resistance with wedge lock design that maintains tight fastening under dynamic loads
- Enhanced grip and anti-loosening performance through dual-sided serrations on both top and bottom surfaces
- Exceptional corrosion resistance with Black Oxide 316 Stainless Steel construction for harsh environments
- Long-term durability ensured by case hardening to Rockwell C46 hardness for reduced wear
- Versatile compatibility with both inch (No. 5) and metric (M3) screw systems for global applications
- Reliable industrial compliance meeting RoHS 3 and REACH standards for safe, regulated use
- Precise dimensional fit with 0.13" ID and 0.28" OD for consistent performance in assembly
Professional Applications & Engineering Value
These wedge lock washers are engineered to solve critical vibration-induced loosening in industrial machinery, automotive assemblies, and heavy equipment. The Black Oxide 316 Stainless Steel material provides excellent resistance to corrosion and oxidation, making them ideal for outdoor or chemically aggressive environments. Dual top and bottom serrations bite into both the fastener and surface, creating a mechanical lock that outperforms standard washers. With case hardened treatment achieving Rockwell C46 hardness, they withstand high cyclic loads without deforming, reducing maintenance downtime. Compatible with both No. 5 and M3 screw sizes, they offer flexibility for multinational engineering projects requiring reliable, long-term fastening solutions.
Specification Summary & Compliance
This washer features precise dimensions with 0.13" ID, 0.28" OD, and thickness ranging 0.080-0.100". Manufactured from 316 Stainless Steel with Black Oxide finish, it undergoes case hardening to Rockwell C46 for optimal strength. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and restricted substance adherence for industrial use.
