S-90481A225 0.348" ID x 2" OD Oversized Washers

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with black-oxide steel finish, ideal for harsh industrial environments
• Precise dimensional fit with 0.348" inner diameter designed for 5/16" screws, ensuring secure fastening
• Wide load distribution from the 2" outer diameter, reducing surface pressure and preventing damage
• Versatile thickness range of 0.047-0.080" for flexibility in assembly and vibration dampening
• Environmental compliance with RoHS 3 and REACH standards, supporting sustainable procurement
• Durable steel construction for long-lasting performance in demanding mechanical applications
• Inch system compatibility for seamless integration with North American machinery and equipment

Professional Applications & Engineering Value

This black-oxide steel flat washer is engineered to address common industrial challenges such as corrosion, uneven load distribution, and fastener loosening. The black-oxide coating provides a protective barrier against moisture and chemicals, extending service life in outdoor or high-humidity settings like construction, automotive assembly, and machinery maintenance. Its 2" outer diameter effectively spreads clamping force over a larger area, protecting soft materials and reducing the risk of surface indentation. With precise 0.348" inner diameter matching 5/16" screws, it ensures reliable alignment and prevents bolt pull-through in structural and mechanical fastening systems. This washer's compliance with RoHS and REACH makes it a responsible choice for manufacturers prioritizing environmental regulations without compromising on industrial-grade durability.

Specification Summary & Compliance

This flat washer adheres to standard inch measurements with an inner diameter of 0.348", outer diameter of 2", and thickness range of 0.047-0.080", designed for use with 5/16" screws. It is manufactured from black-oxide steel for consistent performance and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets strict environmental and safety standards for industrial components.