S-99041A111 0.562" ID Square Washers

Key Features & Benefits at a Glance

• Superior load distribution with a wide 1.375" square surface area, preventing surface damage and fastener embedment.
• Enhanced corrosion resistance from the zinc-plated steel construction, ensuring long-term reliability in harsh environments.
• Precise fit for 1/2" screws with a 0.562" inner diameter, providing secure fastening and reducing installation errors.
• Exceptional mechanical strength with a Rockwell B40 hardness, offering reliable performance under high-stress conditions.
• Consistent dimensional stability with a thickness range of 0.170-0.200", ensuring uniform pressure and joint integrity.
• Compliance with global environmental standards, including RoHS 3 and REACH, making them safe for international industrial use.
• Durable, heavy-duty design in inch measurements, ideal for robust machinery and structural assemblies.

Professional Applications & Engineering Value

This zinc-plated steel square washer is engineered to solve critical challenges in industrial assembly, such as joint loosening and material fatigue. Its square shape provides a larger bearing surface than standard round washers, effectively distributing clamp load and preventing pull-through in soft materials or painted surfaces. The Rockwell B40 hardness ensures it maintains its form under high torque and vibration, common in heavy machinery, construction equipment, and automotive frameworks. The zinc plating offers a sacrificial layer that fights corrosion, extending the service life of the assembly even in outdoor or humid conditions. Specifically designed for 1/2" screws, it streamlines inventory and installation in maintenance and manufacturing operations, reducing downtime and improving the reliability of bolted connections.

Specification Summary & Compliance

This washer features an inner diameter of 0.562" and a width of 1.375" with a thickness tolerance of 0.170-0.200", manufactured to standard inch system specifications for consistent fit. It is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global supply chains. The material, zinc-plated steel, and specified hardness provide reliable performance in accordance with common industrial fastening requirements.