S-90495A111 0.285" ID x 1.25" OD Oversized Washers
Oversized Washers
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Basic Information
Dimension Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior corrosion resistance with zinc yellow-chromate plating, extending service life in harsh industrial environments.
- Exceptional load distribution thanks to the 1.25" OD and 0.285" ID, preventing surface damage and loosening under high stress.
- High-strength performance with Grade 8 classification and Rockwell C38 hardness, ensuring reliability in heavy-duty applications.
- Precise 1/4" screw compatibility for secure fastening in standard inch-system assemblies.
- Durable material construction using plated steel, offering excellent wear resistance and long-term stability.
- Regulatory compliance with RoHS 3 and REACH standards, meeting global environmental and safety requirements.
- Consistent thickness tolerance (0.047-0.080") for uniform performance and ease of installation.
Professional Applications & Engineering Value
This Grade 8 flat washer is engineered to address common industrial challenges such as joint failure and corrosion-induced degradation. Made from zinc yellow-chromate plated steel, it provides a robust barrier against moisture, chemicals, and abrasion, making it ideal for heavy-duty applications in construction, automotive, and machinery. The precise 1/4" ID and 1.25" OD ensure optimal load spreading, reducing stress concentrations and enhancing the integrity of fastened connections. Its high Rockwell C38 hardness and Grade 8 strength prevent deformation under extreme loads, offering reliable performance in critical assemblies where safety and durability are paramount.
Specification Summary & Compliance
This flat washer adheres to inch system measurements with an inner diameter of 0.285", outer diameter of 1.25", and thickness range of 0.047-0.080", designed for 1/4" screw size compatibility. It meets Grade 8 fastener strength standards and Rockwell C38 hardness for high mechanical performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global industrial use.
