S-99041A132 1.312" ID Square Washers

Key Features & Benefits at a Glance

• Enhanced Load Distribution: The 4" square design significantly increases surface contact area, preventing surface damage and component loosening under heavy loads.
• Superior Corrosion Resistance: The Zinc-Plated Steel construction provides a durable barrier against rust and corrosion, extending the washer's service life in harsh environments.
• Precision Fit for 1 1/4" Screws: The 1.312" inner diameter ensures a perfect fit, reducing installation time and ensuring optimal performance with standard screw sizes.
• Exceptional Mechanical Strength: A Rockwell B40 hardness rating guarantees the washer maintains its shape and integrity under high pressure and stress.
• Guaranteed Material Safety: Compliant with RoHS 3 and REACH regulations, ensuring the product is safe for use in regulated industries and global markets.
• Robust Dimensional Stability: A substantial thickness range of 0.220-0.280" provides reliable spacing and vibration dampening in demanding applications.
• Ideal for Inch-System Projects: Manufactured to inch system specifications, ensuring seamless integration with other standard imperial components.

Professional Applications & Engineering Value

This heavy-duty square washer is engineered to solve critical challenges in construction and machinery assembly. Its large 4" width and square shape are specifically designed for maximum load distribution, effectively preventing the embedding of fasteners into soft materials or the crushing of composite surfaces. The zinc-plated steel material offers a cost-effective solution for corrosion resistance, which is vital for outdoor structures, agricultural equipment, and industrial machinery exposed to moisture. The precise 1.312" ID ensures a snug fit on 1 1/4" screws, eliminating play and maintaining joint integrity under dynamic loads and vibration. This combination of a robust footprint and protective finish directly addresses common failure points, enhancing the longevity and reliability of the entire fastened assembly.

Specification Summary & Compliance

This square washer is manufactured to standard inch system dimensions with an Inner Diameter (ID) of 1.312", a Width of 4", and a Thickness range of 0.220-0.280" for consistent performance. The material is Zinc-Plated Steel with a Rockwell B40 hardness for defined mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) under exemption 6(a) and is REACH (EC 1907/2006) compliant, adhering to the latest substance restrictions for industrial safety and environmental standards.