S-91525A338 0.578" ID x 1.062" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance in harsh environments thanks to 316 stainless steel construction
• Exceptional load distribution with a large 1.062" OD, protecting surfaces and preventing fastener embedment
• Precise fit and secure fastening ensured by the 0.578" ID, perfectly matching 9/16" screws
• Enhanced durability and deformation resistance from Rockwell B68 hardness for long service life
• Reliable performance under heavy loads with a robust 0.110-0.140" thickness range
• Global regulatory compliance with RoHS 3 and REACH, ensuring safe use in regulated industries
• Broad industrial compatibility with inch system fasteners for seamless integration into existing assemblies

Professional Applications & Engineering Value

This 316 stainless steel flat washer is engineered to solve critical challenges in demanding industrial settings. Its high molybdenum content provides exceptional pitting and crevice corrosion resistance, making it ideal for marine, chemical processing, and offshore applications where exposure to chlorides is common. The precise 0.578" ID ensures perfect alignment with 9/16" screws, eliminating play and maintaining joint integrity. With a substantial 1.062" OD and controlled thickness, it effectively distributes clamping force over a wider area, preventing surface damage and reducing stress concentration. This combination of material properties and dimensional accuracy delivers reliable performance in heavy-duty grade applications where fastener failure is not an option.

Specification Summary & Compliance

This flat washer features inch system dimensions with 0.578" ID, 1.062" OD, and 0.110-0.140" thickness, manufactured to standard flat washer specifications for 9/16" screw sizes. The 316 stainless steel construction provides Rockwell B68 hardness for consistent mechanical performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting the latest environmental and safety standards for industrial components.