S-90481A202 0.344" ID x 1.625" OD Oversized Washers

Key Features & Benefits at a Glance

• Enhanced corrosion resistance from the black-oxide steel finish, extending service life in demanding environments.
• Precise dimensional fit with a 0.344" ID and 1.625" OD, ensuring optimal load distribution for 5/16" screws.
• Durable construction using robust steel material, providing reliable, long-lasting performance under pressure.
• Versatile thickness range of 0.051-0.080", accommodating slight variations for secure fastening in diverse assemblies.
• Compliance with strict environmental standards, including RoHS 3 and REACH, ensuring safe and sustainable use.
• Broad industrial applicability due to inch system measurements, making it ideal for various machinery and equipment.
• Cost-effective solution by preventing fastener loosening and surface damage, reducing maintenance needs.

Professional Applications & Engineering Value

This black-oxide steel flat washer is engineered to address common industrial challenges such as corrosion, vibration, and uneven load distribution. Its 0.344" ID and 1.625" OD dimensions ensure a precise fit for 5/16" screws, minimizing the risk of loosening in high-stress applications like automotive assemblies, construction frameworks, and heavy machinery. The black-oxide surface treatment provides a protective layer that resists rust and wear, enhancing durability in humid or abrasive conditions. By distributing load evenly and protecting surfaces, this washer helps prevent joint failure and extends the lifespan of connected components, making it a reliable choice for engineers and procurement specialists seeking efficient, RoHS and REACH compliant fastening solutions.

Specification Summary & Compliance

This flat washer adheres to inch system standards with an inner diameter of 0.344", outer diameter of 1.625", and thickness ranging from 0.051" to 0.080", designed specifically for 5/16" screw sizes. It is manufactured from black-oxide steel for consistent performance and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory alignment for industrial use.