S-99041A141 0.438" ID Square Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in harsh industrial environments
• Optimal load distribution thanks to the 2" square design that prevents fastener embedment and surface damage
• Precision fit for 3/8" screws with 0.438" inner diameter ensuring secure fastening and vibration resistance
• Enhanced durability with Rockwell B40 hardness providing reliable performance under heavy loads
• Consistent thickness tolerance (0.110-0.140") for uniform pressure distribution and assembly reliability
• Compliance with global standards including RoHS 3 and REACH for safe use in regulated industries
• Interchangeable compatibility with inch-system components for seamless integration in existing assemblies

Professional Applications & Engineering Value

This zinc-plated steel square washer delivers critical engineering solutions where standard washers fail. The 2" square configuration provides significantly larger surface contact than round washers, effectively distributing clamp load across broader areas to prevent material deformation in soft substrates. The zinc plating creates a sacrificial barrier against oxidation, making these industrial washers ideal for outdoor equipment, structural steel connections, and machinery exposed to moisture. With precise 0.438" ID matching 3/8" screw size requirements, these washers eliminate play while the Rockwell B40 hardness maintains dimensional stability under sustained pressure. Engineers specify these heavy-duty washers for construction, manufacturing, and transportation applications where vibration resistance and long-term reliability are paramount.

Specification Summary & Compliance

Manufactured to inch system standards with precise 0.438" inner diameter and 0.110-0.140" thickness tolerance for consistent performance. The zinc-plated steel construction meets industrial hardness requirements at Rockwell B40. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and restricted substance adherence for global industrial applications.