S-90313A501 0.109" ID x 0.312" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel, ideal for humid or chemically exposed environments, reducing maintenance and replacement costs.
• Precise dimensional fit with 0.109" ID and 0.312" OD ensures secure seating for No. 3 screws, minimizing loosening and vibration-related failures.
• Enhanced load distribution due to consistent thickness (0.050-0.080"), protecting surfaces and extending the life of assembled components.
• Reliable hardness rated at Rockwell B68, offering excellent resistance to deformation under pressure for long-term structural integrity.
• Full regulatory compliance with RoHS 3 and REACH standards, ensuring safe use in global markets and environmentally sensitive applications.
• Durable performance in demanding conditions, thanks to the material's innate strength and resistance to rust and staining.
• Versatile compatibility with inch-system fasteners, simplifying sourcing and integration into existing industrial assemblies.

Professional Applications & Engineering Value

This 18-8 stainless steel flat washer is engineered to address common industrial challenges, such as corrosion-induced fastener failure and uneven load distribution. Its high-grade material and precise inch dimensions (0.109" ID x 0.312" OD) ensure a reliable fit for No. 3 screw applications, preventing galvanic corrosion and reducing assembly stress. Ideal for demanding environments like marine, chemical processing, and outdoor equipment, the washer's Rockwell B68 hardness and flat design provide consistent performance, minimizing downtime and enhancing the durability of industrial assemblies. By offering excellent corrosion resistance and compliance with major regulations, it supports efficient, long-lasting mechanical connections in B2B settings.

Specification Summary & Compliance

This flat washer adheres to standard inch measurement tolerances, with an inner diameter of 0.109", outer diameter of 0.312", and thickness ranging from 0.050" to 0.080", designed specifically for No. 3 screw sizes. It conforms to common industrial specifications for stainless steel flat washers and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for international supply chains.