S-90459A101 0.312" ID x 0.75" OD USS Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from high-quality aluminum construction, ideal for harsh environments and outdoor applications
• Lightweight performance reduces overall assembly weight without compromising on durability or function
• Precise USS standard dimensions ensure reliable fit and consistent performance with 1/4" fasteners
• Optimized load distribution with 0.75" outer diameter protecting surfaces and preventing embedment
• Secure fastener retention through exact 0.312" inner diameter maintaining proper alignment
• Versatile thickness range (0.051-0.080") accommodates various assembly requirements and gap-filling needs
• Full regulatory compliance meeting RoHS 3 and REACH standards for global industrial use

Professional Applications & Engineering Value

This aluminum flat washer with USS designation provides essential engineering solutions where corrosion resistance and weight reduction are critical. The aluminum material prevents galvanic corrosion in mixed-metal assemblies while maintaining structural integrity. With precise 0.312" ID and 0.75" OD dimensions following inch system standards, these washers deliver consistent performance in industrial applications including electronics enclosures, marine equipment, and aerospace components. The flat washer design effectively distributes clamping force, preventing surface damage and maintaining joint integrity under vibration and thermal cycling conditions.

Specification Summary & Compliance

This USS standard flat washer features precise dimensional tolerances with 0.312" inner diameter, 0.75" outer diameter, and thickness range of 0.051-0.080" compatible with 1/4" screw size. Manufactured to USS flat washer specifications in inch measurement system. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial procurement.