S-90770A033 0.539" ID x 1.25" OD General Purpose Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from Alloy 20 stainless steel, ideal for harsh chemical and acidic environments, extending service life and reducing replacement frequency.
• Precise dimensional fit with 0.539" ID and 1.25" OD ensures secure seating for 1/2" screws, minimizing loosening and vibration-related failures.
• Consistent load distribution due to uniform 0.070-0.076" thickness, protecting surfaces and preventing fastener embedment.
• Broad compatibility with inch-system fasteners and equipment, simplifying sourcing and assembly in North American industrial settings.
• Durable construction without a specified hardness rating, suitable for general industrial use where extreme mechanical stress is not the primary concern.
• Versatile application range from chemical processing to general manufacturing, offering reliable performance under corrosive conditions.

Professional Applications & Engineering Value

This Alloy 20 stainless steel flat washer is engineered to address critical challenges in corrosive industrial environments, such as chemical processing plants, pharmaceutical manufacturing, and marine applications. The high nickel and chromium content in Alloy 20 provides exceptional resistance to sulfuric acid, phosphoric acid, and other aggressive chemicals, preventing premature failure and maintenance downtime. Its flat washer design with precise 0.539" ID and 1.25" OD ensures even pressure distribution under 1/2" screws, reducing stress concentration on joined materials. By utilizing inch-system dimensions, it integrates seamlessly with existing equipment, offering a reliable sealing and spacing solution that enhances the longevity and safety of assemblies in demanding industrial washers applications.

Specification Summary & Compliance

This flat washer adheres to standard inch-system dimensions with an inner diameter of 0.539", outer diameter of 1.25", and thickness range of 0.070-0.076", designed specifically for 1/2" screw size. Manufactured from Alloy 20 stainless steel, it meets general industry standards for corrosion-resistant components. While hardness is not rated, the washer is produced to common commercial tolerances suitable for non-critical structural applications. It complies with relevant material specifications for stainless steel washers and is suitable for use in systems requiring RoHS and REACH compliance, ensuring environmental and safety standards are met in various industrial sectors.