S-90481A203 0.438" ID x 1.5" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide steel finish, extending service life in demanding environments
• Precise dimensional fit with 0.438" ID designed specifically for 3/8" screws, ensuring secure fastening
• Optimal load distribution through 1.5" OD, preventing surface damage and maintaining joint integrity
• Versatile thickness range (0.060-0.090") accommodates various assembly requirements and compression needs
• Environmental compliance assurance with RoHS 3 and REACH adherence for global industrial applications
• Durable steel construction provides reliable performance in mechanical and hardware assemblies

Professional Applications & Engineering Value

This black-oxide steel flat washer delivers critical engineering solutions for industrial applications where corrosion resistance and dimensional precision are paramount. The black-oxide surface treatment creates a protective barrier against moisture and chemical exposure, significantly reducing maintenance requirements in outdoor equipment, machinery assemblies, and automotive applications. With its 1.5" outer diameter, this 3/8 inch flat washer effectively distributes clamping force over a wider area, preventing surface indentation and maintaining structural integrity in sheet metal, construction, and manufacturing applications. The precise 0.438" inner diameter ensures perfect alignment with standard 3/8" fasteners, eliminating installation issues and providing consistent performance across production runs.

Specification Summary & Compliance

Manufactured to standard inch dimensions with 0.438" ID and 1.5" OD, this flat washer features a thickness range of 0.060-0.090" for versatile application requirements. The product maintains compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and global market acceptance. Made from quality black-oxide steel, this washer provides reliable performance for industrial hardware and mechanical assemblies requiring corrosion-resistant components.