S-90474A163 0.203" ID x 0.734" OD ASME B18.21.1 ASME Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from the black-oxide steel finish, extending service life in humid or demanding environments.
• Precise dimensional fit with a 0.203" ID and 0.734" OD, ensuring reliable alignment and load distribution for No. 10 screws.
• Consistent thickness control (0.056" to 0.071") for uniform pressure application and reduced risk of fastener loosening.
• Compliance with ASME B18.21.1 standards, guaranteeing interchangeability and performance reliability in industrial assemblies.
• Environmental regulatory adherence with RoHS 3 and REACH compliance, supporting sustainable and safe manufacturing practices.
• Enhanced durability in heavy-duty applications due to robust steel construction, suitable for high-stress mechanical assemblies.
• Broad compatibility with inch-system components, simplifying sourcing and integration in North American and global projects.

Professional Applications & Engineering Value

These Black-Oxide Steel Flat Washers address common industrial challenges such as galvanic corrosion and inconsistent load bearing in machinery, automotive, and construction applications. The black-oxide surface treatment provides a protective layer that minimizes rust and wear, crucial for outdoor or high-moisture settings. Engineered to ASME B18.21.1 specifications, they ensure precise fit with No. 10 screw sizes, preventing assembly failures and reducing maintenance costs. Their inch-based dimensions (0.203" ID x 0.734" OD) and controlled thickness deliver reliable performance in heavy-duty washers roles, making them ideal for OEMs and MRO suppliers seeking corrosion-resistant washers that meet stringent environmental and mechanical standards.

Specification Summary & Compliance

This flat washer features an inner diameter of 0.203", outer diameter of 0.734", and thickness range of 0.056" to 0.071", designed for No. 10 screw sizes. It conforms to ASME B18.21.1 for dimensional accuracy and performance, ensuring compatibility and reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, affirming its adherence to environmental safety and restricted substance guidelines.