S-92140A118 0.406" ID x 1.625" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to the black-oxide steel finish, extending the washer's service life in demanding environments.
• Precise fit for 3/8" fasteners with a 0.406" inner diameter, ensuring secure and stable assembly connections.
• Optimal load distribution from the large 1.625" outer diameter, helping to prevent surface damage and joint loosening.
• Consistent dimensional stability with a thickness of 0.120-0.130", providing reliable performance under pressure.
• Compliance with major environmental regulations including RoHS 3 and REACH, ensuring safe use in regulated industrial applications.
• Durable steel construction offers excellent strength and longevity for repetitive use in mechanical assemblies.

Professional Applications & Engineering Value

This black-oxide steel flat washer is engineered to address common industrial challenges such as surface galling, corrosion, and uneven load distribution. The black-oxide coating provides a robust barrier against moisture and chemicals, making it ideal for outdoor equipment, automotive assemblies, and machinery exposed to harsh conditions. Its precise 0.406" ID ensures a snug fit on 3/8" screws, reducing the risk of misalignment, while the generous 1.625" OD disperses clamping force effectively to protect soft materials and maintain bolt tension. By combining inch-system sizing with high-grade steel, this flat washer delivers reliable performance in construction, manufacturing, and maintenance applications where durability and compliance are critical.

Specification Summary & Compliance

This flat washer conforms to standard inch dimensions with an inner diameter of 0.406", outer diameter of 1.625", and thickness ranging from 0.120" to 0.130". It is designed for use with 3/8" screw sizes and is manufactured from black-oxide steel for enhanced durability. The product is verified to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant (including the latest SVHC list as of 01/17/2023), meeting essential environmental and safety standards for industrial components.