S-90377A113 0.125" ID x 0.375" OD Oversized Washers

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with Black-Oxide 18-8 Stainless Steel, ideal for harsh environments like marine or chemical settings.
• Enhanced load distribution from precise 0.125" ID and 0.375" OD dimensions, reducing surface stress and preventing fastener loosening.
• Superior durability backed by Rockwell B68 hardness, ensuring long-term performance under mechanical stress.
• Reliable fit for No. 4 screws with consistent thickness (0.050-0.080"), providing secure fastening in industrial assemblies.
• Compliance with global standards including RoHS 3 and REACH, meeting environmental and safety regulations for international projects.
• Versatile application range from automotive to heavy machinery, thanks to robust material and inch-based sizing.

Professional Applications & Engineering Value

This flat washer in Black-Oxide 18-8 Stainless Steel addresses critical engineering challenges in corrosive or high-stress environments. Its corrosion-resistant properties prevent rust and degradation, extending service life in industries like marine, automotive, and industrial manufacturing. The precise inch system dimensions (0.125" ID x 0.375" OD) ensure accurate alignment with No. 4 screw sizes, minimizing installation errors and enhancing structural integrity. Combined with a controlled thickness range, it effectively distributes loads, reduces wear on components, and supports reliable fastening solutions in demanding applications where failure is not an option.

Specification Summary & Compliance

This flat washer adheres to standard inch measurements with an ID of 0.125", OD of 0.375", and thickness of 0.050-0.080", designed for No. 4 screw sizes. It meets material specifications for 18-8 Stainless Steel with a hardness of Rockwell B68 and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory alignment for global supply chains.