S-90895A115 1.244" ID x 1.772" OD Heavy-Vibration-Resistant Spring Lock Washers for Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional vibration resistance prevents fastener loosening in high-stress environments, ensuring long-term assembly integrity.
• Dual-sided serrations on both top and bottom surfaces provide superior bite and grip, enhancing locking performance on uneven surfaces.
• Corrosion-resistant 18-8 Stainless Steel construction offers excellent durability in harsh or outdoor industrial settings.
• High Rockwell C38 hardness ensures the washer maintains its shape and locking force under heavy loads and repeated use.
• Versatile inch and metric compatibility fits both 1 1/8" and M30 screw sizes, providing flexibility for global equipment designs.
• Full RoHS 3 and REACH compliance guarantees safe, environmentally responsible use in regulated markets and applications.
• Precision dimensions (1.244" ID, 1.772" OD) ensure consistent fit and reliable performance in standardized assemblies.

Professional Applications & Engineering Value

This spring lock washer is engineered to solve critical vibration-induced loosening in demanding industrial applications. The 18-8 Stainless Steel material provides inherent corrosion resistance, making it ideal for machinery, automotive, and marine environments where moisture and chemicals are present. The unique top and bottom serration design increases frictional resistance on both contact surfaces, effectively locking the fastener in place even under dynamic loads and thermal cycling. By combining high hardness (Rockwell C38) with dual-sided grip, this washer reduces maintenance frequency and prevents assembly failure in heavy-duty equipment, conveyor systems, and structural frameworks. Its compatibility with both inch (1 1/8") and metric (M30) screw sizes offers versatility for multinational engineering projects, ensuring reliable performance across diverse industrial standards.

Specification Summary & Compliance

This washer features precise dimensions with an Inside Diameter of 1.244" and Outside Diameter of 1.772", manufactured to standard tolerances for consistent fit. It is designed for use with 1 1/8" or M30 screw sizes and meets general industrial requirements for spring lock washers. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free of restricted hazardous substances and safe for use in industrial applications globally.