S-90313A511 0.531" ID x 1" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and long-term reliability.
• Enhanced load distribution from the 1" outer diameter, reducing surface pressure and preventing material damage.
• Precise fit for 1/2" screws with a 0.531" inner diameter, ensuring secure fastening and minimizing loosening.
• Consistent mechanical strength due to Rockwell B68 hardness, offering dependable performance under stress.
• Durable and uniform thickness ranging from 0.060" to 0.090", providing stability and vibration resistance.
• Compliance with environmental standards including RoHS 3 and REACH, ensuring safe and sustainable industrial use.
• Broad compatibility with inch-system applications, simplifying sourcing and installation in various projects.

Professional Applications & Engineering Value

This 18-8 stainless steel flat washer is engineered to address common industrial challenges such as corrosion, vibration-induced failure, and inconsistent load bearing. Its high corrosion resistance makes it suitable for demanding sectors like marine, chemical processing, and outdoor construction, where exposure to moisture and chemicals is frequent. The precise 0.531" ID and 1" OD dimensions ensure optimal alignment and pressure distribution for 1/2" screw size applications, reducing the risk of joint fatigue and enhancing assembly integrity. By incorporating Rockwell B68 hardness, it maintains structural stability under mechanical stress, making it a reliable choice for heavy-duty machinery, automotive systems, and infrastructure projects that require long-lasting, corrosion-resistant washers.

Specification Summary & Compliance

This flat washer adheres to inch measurement standards with an inner diameter of 0.531", outer diameter of 1", and thickness tolerance of 0.060–0.090". It is manufactured from 18-8 stainless steel with a hardness of Rockwell B68, ensuring consistent quality and performance. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety and environmental responsibility for industrial use.