S-99041A113 0.688" ID Square Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance through zinc plating, extending service life in humid or outdoor environments
• Exceptional load distribution with 1.75" square design, preventing surface damage and fastener loosening
• Precision fit for 5/8" fasteners with 0.688" inner diameter, ensuring secure installation and alignment
• Enhanced structural integrity with Rockwell B40 hardness, maintaining shape under heavy loads
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for global industrial applications
• Robust thickness range (0.170-0.200") providing consistent performance in high-stress assemblies
• Dimensional stability in inch measurement system, ensuring compatibility with North American machinery standards

Professional Applications & Engineering Value

This zinc-plated steel square washer delivers critical engineering solutions where standard washers fail. The 1.75" width creates an expanded bearing surface that effectively distributes clamping forces across a wider area, preventing material deformation in soft substrates and reducing stress concentration around 5/8" fastener points. The zinc plating provides sacrificial protection against galvanic corrosion, making these industrial washers ideal for outdoor equipment, structural steel connections, and machinery exposed to moisture. With Rockwell B40 hardness, these heavy-duty square washers maintain dimensional stability under sustained vibration and dynamic loads, eliminating the need for frequent maintenance in conveyor systems, construction equipment, and heavy manufacturing applications.

Specification Summary & Compliance

Manufactured to precise inch system dimensions with 0.688" inner diameter for exact 5/8" screw size compatibility and 1.75" width square configuration. Features consistent thickness between 0.170-0.200" for reliable performance in stacked assemblies. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and unrestricted use in international markets. The Rockwell B40 hardness rating guarantees mechanical durability across demanding industrial applications.