S-99041A118 0.688" ID Square Washers

Key Features & Benefits at a Glance

• Superior load distribution with 4" square design to prevent fastener pull-through and surface damage
• Enhanced corrosion resistance through zinc-plated steel construction for extended service life in demanding environments
• Precise fitment with 0.688" inner diameter ensuring optimal alignment with 5/8" fasteners
• Exceptional structural integrity maintained through Rockwell B40 hardness rating for repeated heavy-load applications
• Consistent performance guaranteed by controlled 0.220-0.280" thickness range for reliable compression and spacing
• Environmental compliance meeting RoHS 3 and REACH standards for global industrial deployment
• Heavy-duty construction providing maximum bearing surface for structural and machinery applications

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this 4" square washer solves critical engineering challenges in construction, machinery assembly, and structural framing. The zinc-plated steel construction provides essential corrosion protection in environments where moisture and chemicals are present, while the substantial square profile distributes clamping forces over a wider area than standard round washers. This prevents surface deformation and maintains joint integrity under high vibration conditions. The precise 0.688" inner diameter ensures perfect alignment with 5/8" fasteners, eliminating installation issues and reducing assembly time. With its Rockwell B40 hardness, this washer maintains dimensional stability under extreme pressure, making it ideal for structural connections, equipment bases, and heavy machinery where failure is not an option.

Specification Summary & Compliance

This square washer features inch system dimensions with 4" width, 0.688" inner diameter, and thickness ranging 0.220-0.280" for precise fitment with 5/8" screws. Manufactured from zinc-plated steel with Rockwell B40 hardness rating, it delivers consistent performance in demanding applications. The product is fully compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel and meets REACH (EC 1907/2006) standards regarding Substance of Very High Concern restrictions, ensuring environmental responsibility and global market acceptance.