S-99041A201 0.125" ID Square Washers

Key Features & Benefits at a Glance

• Superior load distribution with a 0.5" width square design, preventing fastener loosening and surface damage under stress.
• Enhanced corrosion resistance through zinc-plated steel construction, ideal for humid or outdoor industrial environments.
• Consistent mechanical performance ensured by Rockwell B40 hardness, maintaining shape and function under repeated loads.
• Precise compatibility with No. 4 screws and a 0.125" inner diameter, providing secure fit and reducing assembly errors.
• Reliable thickness tolerance (0.042-0.051") for uniform pressure application and vibration resistance in machinery.
• Environmental compliance meeting RoHS 3 and REACH standards, safe for regulated industries and global supply chains.
• Durability in inch-system applications, crafted for long-term use in North American industrial equipment and assemblies.

Professional Applications & Engineering Value

Engineered for demanding environments, these zinc-plated steel square washers address critical issues like uneven load distribution and corrosion in industrial assemblies. The square shape offers a larger surface area than round washers, effectively spreading clamp load to prevent material deformation around No. 4 screw fastening points. This is vital in electrical enclosures, automotive components, and machinery where vibration can cause standard washers to fail. The zinc plating provides a sacrificial layer, resisting rust and extending service life in moisture-prone settings. With precise 0.125" ID and consistent thickness, these washers ensure reliable performance in OEM and MRO applications, reducing maintenance costs and downtime.

Specification Summary & Compliance

This square washer features an inner diameter of 0.125" and width of 0.5" with a thickness range of 0.042-0.051", manufactured to inch system standards for exact fit. The zinc-plated steel material achieves a Rockwell B40 hardness, ensuring mechanical durability. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to environmental and safety requirements for industrial use.