S-99041A225 0.656" ID Square Washers

Key Features & Benefits at a Glance

• Enhanced Load Distribution: Square shape with 1.375" width provides superior surface contact, preventing fastener loosening and material damage in heavy-duty applications.
• Superior Corrosion Resistance: Zinc-plated steel construction offers reliable protection against rust and environmental degradation, extending service life in industrial settings.
• Precision Fit for 5/8" Fasteners: 0.656" inner diameter ensures accurate alignment and secure mounting with standard 5/8" screws, reducing installation errors.
• Optimal Mechanical Strength: Rockwell B40 hardness delivers consistent durability and resistance to deformation under high-pressure conditions.
• Regulatory Compliance Assurance: Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, ensuring safe use in regulated industries and global market acceptance.
• Robust Thickness Tolerance: 0.112-0.127" thickness range provides reliable spacing and vibration dampening, maintaining assembly integrity over time.
• Inch System Compatibility: Designed to imperial measurements for seamless integration with North American machinery and existing fastener inventories.

Professional Applications & Engineering Value

Engineered for demanding industrial environments, this 5/8" square washer addresses critical challenges in construction and mechanical assemblies. The zinc-plated steel material combats corrosion in outdoor or high-moisture applications, while the square geometry prevents rotation during torque application—solving common loosening issues in vibrating machinery. With Rockwell B40 hardness, it maintains structural integrity under repeated stress, making it ideal for heavy equipment, structural steel connections, and automotive frameworks. The precise 0.656" ID ensures perfect alignment with standard 5/8" screws, reducing installation time and improving load distribution across wider surfaces than round washers. These features collectively enhance assembly longevity while meeting strict industry compliance requirements.

Specification Summary & Compliance

This square washer features inch system dimensions with 1.375" width, 0.656" inner diameter, and thickness ranging 0.112-0.127". Manufactured from zinc-plated steel with Rockwell B40 hardness rating, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, including the latest SVHC updates. The product maintains standard industrial tolerances for consistent performance in mechanical fastening applications.