S-99041A115 0.688" ID Square Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in harsh environments
• Exceptional load distribution thanks to the 2" square design, minimizing surface pressure and material deformation
• Precise compatibility with 5/8" screws due to the 0.688" inner diameter, ensuring secure fastening and reduced vibration loosening
• Enhanced durability from Rockwell B40 hardness, providing reliable performance under mechanical stress
• Regulatory peace of mind with full RoHS 3 and REACH compliance, meeting strict environmental and safety standards
• Consistent thickness between 0.112" and 0.128" for uniform clamping force and ease of installation
• Broad industrial applicability in inch-based systems, simplifying sourcing for North American and global projects

Professional Applications & Engineering Value

This zinc-plated steel square washer is engineered to address common industrial challenges like corrosion-induced failure and uneven load distribution. The 2" square washer design offers a larger surface area than round washers, effectively spreading force to prevent damage to soft materials or painted surfaces. With a precise 0.688" ID, it ensures optimal fit for 5/8" screw size applications, reducing the risk of misalignment in heavy machinery, structural steelwork, and outdoor equipment. The zinc plating provides a sacrificial layer that combats rust in humid or chemical-exposed settings, while the Rockwell B40 hardness guarantees the washer maintains its shape under high torque. Ideal for construction, automotive, and manufacturing sectors, this industrial washer delivers long-term reliability and compliance with global standards.

Specification Summary & Compliance

This square washer adheres to inch system measurements with an inner diameter of 0.688", thickness range of 0.112-0.128", and width of 2". It is manufactured from zinc-plated steel and meets Rockwell B40 hardness standards for consistent performance. The product is fully compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead in steel alloys and REACH (EC 1907/2006) regulations as of January 17, 2023, ensuring safe use in regulated industries.