S-99041A204 0.156" ID Square Washers

Key Features & Benefits at a Glance

• Enhanced Load Distribution: Square shape provides a larger bearing surface than round washers, reducing stress and preventing surface damage in assemblies.
• Superior Corrosion Resistance: Zinc-plated steel construction offers reliable protection against rust, extending service life in harsh industrial environments.
• Precise Fit for No. 6 Screws: 0.156" inner diameter ensures accurate alignment and secure fastening, minimizing loosening and vibration issues.
• Optimized Strength and Durability: Rockwell B40 hardness provides excellent mechanical strength, resisting deformation under high loads.
• Wide Coverage and Stability: 0.5" width and 0.042-0.051" thickness offer robust support, ideal for heavy-duty applications requiring even pressure distribution.
• Environmental and Regulatory Safety: Full compliance with RoHS 3 and REACH standards ensures safe use, free from hazardous substances.
• Seamless Integration: Inch system measurements guarantee compatibility with standard North American equipment and fastening systems.

Professional Applications & Engineering Value

This zinc-plated steel square washer is engineered to address common industrial challenges such as fastener loosening, material fatigue, and corrosion. Its square design maximizes contact area, distributing clamp load more effectively than round washers, which is critical in heavy-duty assemblies involving machinery, automotive frames, or structural supports. The Rockwell B40 hardness ensures the washer maintains its shape under repetitive stress, while the zinc plating provides a protective barrier against moisture and chemicals, reducing maintenance needs. Ideal for use with No. 6 screws in inch-based systems, it offers reliable performance in applications requiring precise thread engagement and long-term durability, from manufacturing plants to outdoor equipment.

Specification Summary & Compliance

This square washer features an inner diameter of 0.156", width of 0.5", and thickness range of 0.042-0.051", designed for No. 6 screw sizes in inch measurement systems. It adheres to standard dimensional tolerances for consistent fit and function. Manufactured from zinc-plated steel with a hardness of Rockwell B40, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for global industrial markets.