S-93286A015 0.344" ID x 0.75" OD General Purpose Washers

Key Features & Benefits at a Glance

• Lightweight yet durable construction from aluminum material, reducing overall assembly weight without sacrificing performance in industrial applications.
• Precise dimensional fit with 0.344" ID and 0.75" OD, ensuring secure placement and even load distribution for 5/16" screws.
• Enhanced surface protection with Brinell 120 hardness, resisting deformation under pressure and extending service life.
• Corrosion-resistant properties inherent to aluminum, ideal for environments where moisture or chemicals are present.
• Regulatory compliance assurance with RoHS 3 and REACH standards, meeting global environmental and safety requirements for B2B supply chains.
• Consistent thickness tolerance between 0.052" and 0.072", providing reliable performance in repetitive assembly operations.
• Broad compatibility with inch-system fasteners, simplifying sourcing and integration into existing industrial designs.

Professional Applications & Engineering Value

This aluminum flat washer is engineered to address common industrial challenges such as galvanic corrosion, weight reduction, and regulatory adherence. Its aluminum composition naturally resists rust, making it suitable for outdoor equipment, electrical enclosures, and machinery exposed to humid conditions. The Brinell 120 hardness ensures it maintains shape under clamping forces, preventing loosening in 5/16" screw applications. By combining precision dimensions with a RoHS 3 and REACH compliant build, it supports sustainable manufacturing goals while delivering reliable performance in automotive, aerospace, and construction assemblies, where flat washer integrity is critical to long-term operational safety.

Specification Summary & Compliance

This washer adheres to inch-system standards with an ID of 0.344", OD of 0.75", and thickness range of 0.052–0.072" for consistent fit with 5/16" screw sizes. Manufactured from aluminum with a Brinell 120 hardness rating, it meets general industrial tolerances. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from restricted substances and safe for global use.