S-99041A218 0.406" ID Square Washers

Key Features & Benefits at a Glance

• Enhanced Load Distribution: Square design with 1.375" width provides a larger surface area, reducing stress and preventing surface damage in heavy-duty assemblies.
• Superior Corrosion Resistance: Zinc-plated steel construction offers reliable protection against rust and environmental wear, extending service life in harsh conditions.
• Precise Fit for 3/8" Screws: 0.406" inner diameter ensures accurate alignment and secure fastening, minimizing loosening and vibration issues.
• Optimized Strength and Durability: Rockwell B40 hardness rating delivers consistent mechanical performance, resisting deformation under high loads.
• Regulatory Compliance Assurance: Meets RoHS 3 and REACH standards, ensuring safe, eco-friendly use in global industrial markets.
• Versatile Thickness Range: 0.112-0.127" thickness accommodates varying gap tolerances, enhancing flexibility in assembly applications.
• Broad Industrial Suitability: Inch system compatibility makes it ideal for machinery, construction, and automotive sectors requiring robust fastening solutions.

Professional Applications & Engineering Value

This zinc-plated steel square washer is engineered to address critical challenges in industrial settings, such as uneven load distribution and corrosion-induced failures. Its square shape and precise 1.375" width maximize contact area, effectively dispersing pressure and preventing bolt head embedment in soft materials. The Rockwell B40 hardness ensures the washer maintains integrity under repetitive stress, while the zinc plating provides a durable barrier against moisture and chemicals. Ideal for 3/8" screw applications in construction, automotive, and machinery assemblies, it reduces maintenance needs and enhances the longevity of fastened joints, delivering reliable performance in demanding environments.

Specification Summary & Compliance

This washer adheres to inch system standards with an inner diameter of 0.406", thickness range of 0.112-0.127", and width of 1.375", designed specifically for 3/8" screws. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances and suitable for use in regulated industries. The Rockwell B40 hardness confirms consistent material strength, supporting reliable performance in various mechanical applications.