S-90313A239 0.812" ID x 3.5" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel material, ideal for harsh industrial environments and outdoor applications.
• Precise dimensional fit with 0.812" ID and 3.5" OD, ensuring secure seating and even load distribution for 3/4" screws.
• Enhanced durability and longevity thanks to the robust stainless steel construction, reducing replacement frequency and maintenance costs.
• Reliable load distribution with a thickness range of 0.122-0.145", preventing surface damage and loosening under heavy loads.
• Compliance with environmental standards, including RoHS 3 and REACH, ensuring safe use in regulated industries.
• Versatile inch system compatibility, making it easy to integrate into existing American-standard machinery and assemblies.
• Cost-effective performance by minimizing corrosion-related failures and extending the life of connected components.

Professional Applications & Engineering Value

This 18-8 stainless steel flat washer is engineered to address common industrial challenges such as corrosion-induced failures and uneven load distribution in heavy-duty assemblies. With its high-grade material and precise inch system dimensions (3.5" OD x 0.812" ID), it provides reliable performance in applications like construction frameworks, machinery mounts, and marine equipment, where exposure to moisture and chemicals is frequent. The flat washer design ensures that 3/4" screw sizes are securely fastened, reducing the risk of bolt loosening and surface damage under vibration or dynamic loads. By offering excellent corrosion resistance and durability, it helps maintenance teams cut downtime and enhance the longevity of critical industrial systems, making it a smart choice for engineers and procurement specialists seeking dependable stainless steel hardware.

Specification Summary & Compliance

This flat washer features inch system measurements with an inner diameter of 0.812", outer diameter of 3.5", and thickness ranging from 0.122" to 0.145", designed specifically for use with 3/4" screw sizes. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards for industrial components. The washer is made from 18-8 stainless steel, providing consistent performance without a rated hardness, and is suitable for various assembly applications requiring reliable, corrosion-resistant fastening solutions.