S-91090A103 0.203" ID x 0.5" OD Oversized Washers

Key Features & Benefits at a Glance

• Enhanced Corrosion Resistance: Zinc-plated steel construction provides reliable protection against rust and environmental degradation, extending the washer's service life in demanding conditions.
• Optimal Load Distribution: Designed with a 0.5" outer diameter to evenly spread pressure, preventing surface damage and maintaining joint integrity under load.
• Precise Fit for No. 10 Screws: 0.203" inner diameter ensures a secure and accurate fit, reducing the risk of misalignment and improving assembly efficiency.
• Vibration and Loosening Resistance: Consistent thickness (0.042-0.051") helps absorb shocks and minimize fastener loosening in dynamic applications.
• Strict Environmental Compliance: Meets RoHS 3 and REACH standards, ensuring safe use in industries with rigorous environmental and health regulations.
• Durable Steel Core: Made from robust steel material, offering high strength and reliability for repeated use in industrial hardware assemblies.
• Broad Industrial Compatibility: Ideal for various inch-system applications, providing versatility across multiple sectors without compromising performance.

Professional Applications & Engineering Value

These zinc-plated steel flat washers are engineered to address common industrial challenges such as corrosion, uneven load distribution, and fastener loosening due to vibration. The zinc plating offers a protective barrier against moisture and chemicals, making them suitable for outdoor or harsh environment applications like construction, automotive, and machinery assembly. With precise dimensions (0.203" ID and 0.5" OD), they ensure a perfect match for No. 10 screws, enhancing stability and reducing wear on connected components. This combination of material and design delivers long-term reliability, minimizing maintenance needs and downtime in industrial washers and hardware systems.

Specification Summary & Compliance

This flat washer features inch-system measurements with an inner diameter of 0.203", outer diameter of 0.5", and thickness ranging from 0.042" to 0.051", ensuring dimensional accuracy for standard No. 10 screw applications. Manufactured from zinc-plated steel, it adheres to common industrial standards for flat washers, providing consistent performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in environments requiring strict environmental and safety protocols.