S-90313A115 0.406" ID x 1.5" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh or humid environments.
• Precise dimensional fit with 0.406" ID and 1.5" OD, ensuring secure seating and load distribution for 3/8" screws.
• Consistent thickness tolerance (0.055-0.069") for uniform pressure application and reduced assembly variability.
• Excellent durability in industrial settings, maintaining performance under mechanical stress and vibration.
• Compliance with environmental regulations, meeting RoHS 3 and REACH standards for safe, sustainable use.
• Broad compatibility with inch-system fasteners, simplifying sourcing for North American and global projects.
• Reliable surface protection for connected materials, preventing galvanic corrosion and surface damage.

Professional Applications & Engineering Value

This 18-8 stainless steel flat washer is engineered to address common industrial challenges such as fastener loosening, material degradation, and inconsistent load distribution. Its corrosion-resistant properties make it suitable for outdoor equipment, marine applications, chemical processing plants, and food-grade machinery where moisture and chemicals are present. The precise 0.406" ID and 1.5" OD dimensions ensure a snug fit on 3/8" screws, minimizing movement and distributing clamp load effectively to protect sensitive surfaces. By using inch-system sizing, it integrates seamlessly into existing North American assembly lines, reducing the need for custom parts and speeding up maintenance cycles in automotive, construction, and heavy machinery sectors.

Specification Summary & Compliance

This flat washer is manufactured to standard inch dimensions with an inner diameter of 0.406", outer diameter of 1.5", and thickness ranging from 0.055" to 0.069", designed specifically for use with 3/8" screws. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards for hazardous substances. The 18-8 stainless steel material provides reliable performance without a rated hardness, focusing on corrosion resistance and general-purpose industrial use.