S-90377A203 0.531" 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 from 18-8 stainless steel with black-oxide finish, ideal for harsh industrial environments
- Optimized load distribution with 1.25" OD and 0.531" ID, preventing surface damage and maintaining joint integrity
- Durable construction with 0.170-0.200" thickness, providing reliable performance under heavy-duty fastening applications
- Precision inch-system compatibility designed specifically for 1/2" screws, ensuring perfect fit and ease of installation
- Environmental compliance assurance meeting RoHS 3 and REACH standards for safe, sustainable industrial use
- Long-term cost efficiency through reduced maintenance and replacement needs in demanding applications
Professional Applications & Engineering Value
This heavy-duty flat washer addresses critical engineering challenges in industrial fastening systems where corrosion and material failure are primary concerns. The black-oxide 18-8 stainless steel construction provides exceptional protection against rust and chemical degradation, making it ideal for outdoor equipment, marine applications, chemical processing plants, and food processing machinery. The precise 0.531" ID ensures secure seating on 1/2" screws while the 1.25" OD distributes clamping force effectively, preventing surface indentation and maintaining structural integrity in high-vibration environments. This combination of material excellence and dimensional accuracy delivers reliable performance in demanding industrial washers applications where fastener failure is not an option.
Specification Summary & Compliance
Manufactured to inch system standards with precise internal diameter (0.531" ID), external diameter (1.25" OD), and thickness range (0.170-0.200") for consistent performance. This flat washer is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory adherence for industrial procurement. The 18-8 stainless steel material provides inherent strength and durability without requiring hardness rating for most industrial applications.
