S-98370A005 0.125" ID x 0.25" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel construction, ideal for humid or chemically aggressive environments.
• Enhanced load distribution with a 0.25" outer diameter, protecting surfaces and preventing fastener embedment.
• Precise fit for No. 4 screws with a 0.125" inner diameter, ensuring secure assembly and reducing vibration loosening.
• Consistent mechanical strength provided by Rockwell B83 hardness, offering reliable performance under stress.
• Durable and long-lasting performance due to the material's inherent toughness and controlled thickness (0.049-0.068").
• Compliance with major environmental regulations, being RoHS 3 and REACH compliant for safe and responsible industrial use.
• Versatile inch-system compatibility, designed for seamless integration with standard inch-based assemblies.

Professional Applications & Engineering Value

This 18-8 Stainless Steel Flat Washer is engineered to address common challenges in industrial fastening, such as galvanic corrosion, surface damage, and joint failure. Its corrosion-resistant properties make it suitable for demanding applications in marine, chemical processing, and outdoor equipment, where exposure to moisture and chemicals is a concern. The precise 0.125" ID and 0.25" OD ensure optimal load distribution, reducing stress concentrations and extending the life of both the washer and the connected components. By using these flat washers with No. 4 screws, engineers can achieve more reliable, maintenance-free assemblies in machinery, electronics, and structural frameworks, enhancing overall system durability and safety.

Specification Summary & Compliance

This flat washer adheres to standard inch measurement specifications, with an inner diameter of 0.125", outer diameter of 0.25", and thickness ranging from 0.049" to 0.068". It is designed for use with No. 4 screw sizes and features a Rockwell B83 hardness for consistent mechanical performance. The product is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets strict environmental and safety standards for industrial components.