S-90895A021 0.748" ID x 1.063" OD Heavy-Vibration-Resistant Spring Lock Washers for Socket Head Screws

Key Features & Benefits at a Glance

• Superior vibration resistance with dual-sided serrations (top and bottom) that bite into mating surfaces to prevent loosening under dynamic loads
• Exceptional corrosion resistance from 18-8 stainless steel construction, ideal for harsh industrial environments and outdoor applications
• Optimized dimensional compatibility with 0.748" ID perfectly matching M18 screw sizes for precise fit and reliable fastening performance
• Enhanced durability and spring retention thanks to Rockwell C38 hardness, maintaining locking force through repeated compression cycles
• Broad industrial compliance meeting both RoHS 3 and REACH environmental standards for global manufacturing applications
• Dual-surface gripping action providing maximum locking security regardless of installation orientation or surface conditions
• Metric system compatibility ensuring seamless integration with international engineering specifications and equipment designs

Professional Applications & Engineering Value

This M18 spring lock washer delivers critical vibration-resistant fastening for demanding industrial applications where safety and reliability are paramount. The 18-8 stainless steel construction provides excellent corrosion resistance in chemical processing, marine, and food industry environments, while the dual serration design (top and bottom) creates positive locking action that prevents back-off in high-vibration machinery, automotive assemblies, and heavy equipment. The Rockwell C38 hardness ensures the spring maintains its tension and locking force through repeated thermal cycles and mechanical stress, making it ideal for permanent installations in construction, manufacturing, and transportation equipment where maintenance access is limited. The metric dimensions and precise 0.748" ID provide perfect compatibility with M18 fastening systems in European and international engineering specifications.

Specification Summary & Compliance

This spring lock washer features precision dimensions: 0.748" inner diameter, 1.063" outer diameter, 0.059" thickness, and 0.091" overall height, specifically engineered for M18 screw applications. Manufactured from 18-8 stainless steel with Rockwell C38 hardness for optimal spring performance and durability. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, meeting current regulatory requirements for industrial fastener applications worldwide. The dual serration design (top and bottom) provides enhanced locking capability across various surface materials and conditions.