S-90463A101 0.313" ID x 0.75" OD USS Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from nickel plating over brass, ideal for harsh environments and extending service life
• Excellent electrical conductivity for grounding and electrical applications where reliable current flow is critical
• Precise dimensional fit with a 0.313" ID and 0.75" OD, ensuring secure fastening for 1/4" screws and reducing installation issues
• Durable construction with a controlled thickness of 0.051-0.080", providing consistent load distribution and vibration resistance
• Compliance with major regulations including RoHS 3 and REACH, ensuring safety and environmental standards for global supply chains
• Broad industrial compatibility as a USS standard flat washer, designed for reliable performance in various mechanical assemblies

Professional Applications & Engineering Value

This Nickel Plated Brass USS Flat Washer is engineered to address common industrial challenges such as galvanic corrosion and electrical isolation in fastening systems. The brass core provides inherent electrical conductivity, making it essential for grounding applications in electrical enclosures and machinery, while the nickel plating significantly enhances corrosion resistance against moisture, chemicals, and atmospheric exposure. Its USS standard design and precise 0.313" ID ensure a snug fit on 1/4" screws, preventing loosening under vibration and distributing clamp load effectively to protect sensitive surfaces. Ideal for use in electronics, marine, and automotive industries, this washer combines material advantages with dimensional accuracy to improve assembly reliability and longevity in demanding environments.

Specification Summary & Compliance

This washer features an Inside Diameter (ID) of 0.313", Outside Diameter (OD) of 0.75", and Thickness ranging from 0.051" to 0.080", designed for use with 1/4" screw sizes in the inch system. It conforms to the USS (United States Standard) flat washer designation, ensuring consistent quality and fit. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to environmental and safety standards for hazardous substances.