S-98370A027 0.203" ID x 0.5" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 18-8 stainless steel construction, ensuring long-term reliability in harsh environments.
• Exceptional durability and load distribution with a Rockwell B83 hardness rating, preventing deformation under pressure.
• Precise fit for No. 10 screws with a 0.203" inner diameter, reducing installation errors and improving assembly efficiency.
• Optimal surface coverage and stability from the 0.5" outer diameter, minimizing stress on connected materials.
• Consistent performance in inch-system applications, ensuring compatibility with standard industrial equipment and fasteners.
• Environmentally compliant design meeting RoHS 3 and REACH standards, safe for regulated industries and global supply chains.
• Reliable thickness tolerance (0.080-0.099") for uniform spacing and secure fastening in repetitive assemblies.

Professional Applications & Engineering Value

This 18-8 stainless steel flat washer is engineered to address common industrial challenges such as galvanic corrosion, vibration loosening, and material fatigue. Its high corrosion resistance makes it ideal for outdoor machinery, marine equipment, and chemical processing plants where moisture and chemicals are prevalent. The flat washer design evenly distributes clamping force, preventing surface damage to soft materials and maintaining joint integrity under dynamic loads. With precise dimensions tailored for No. 10 screw size in inch-system assemblies, it reduces the risk of misalignment and simplifies maintenance in automotive, aerospace, and heavy machinery applications. The combination of Rockwell B83 hardness and stringent manufacturing ensures consistent performance in high-stress environments, lowering lifecycle costs and enhancing operational safety.

Specification Summary & Compliance

This flat washer adheres to standard inch-system dimensions with an ID of 0.203", OD of 0.5", and thickness ranging from 0.080" to 0.099". It is manufactured from 18-8 stainless steel and meets industry-recognized hardness standards (Rockwell B83). The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for use in environmentally conscious and regulated sectors.