S-98694A135 5/8"-11 Square Nuts

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with zinc-plated steel construction, ideal for harsh industrial environments and outdoor applications.
• Superior load-bearing capability from Grade 5 strength rating, ensuring reliable performance in high-stress assemblies.
• Simplified and secure installation with a 1" external square drive, providing excellent tool grip and preventing slippage during tightening.
• Precise and reliable thread engagement due to the Class 2B thread fit, reducing the risk of cross-threading and ensuring consistent clamping force.
• Wide compatibility with 5/8"-11 UNC coarse threaded bolts, a common standard for heavy machinery and structural applications.
• Compliance with stringent environmental regulations, being RoHS 3 and REACH compliant, making it suitable for regulated industries and global supply chains.
• Optimized for high-torque applications with its square nut design, which offers greater surface contact to resist loosening under vibration.

Professional Applications & Engineering Value

This 5/8"-11 UNC Grade 5 zinc-plated steel square nut is engineered to address critical challenges in industrial fastening, such as vibration-induced loosening and environmental degradation. The coarse thread (UNC) design allows for quicker assembly and is less prone to clogging with debris, making it ideal for construction equipment, agricultural machinery, and heavy-duty structural frameworks. The zinc plating provides a robust barrier against rust and corrosion, extending the service life of assemblies exposed to moisture or chemicals. Combined with the external square drive, it ensures a firm grip for wrenches, enabling high-torque installation without rounding the edges. This nut delivers reliable, long-term performance in demanding applications where precision Class 2B thread fit and material durability are non-negotiable.

Specification Summary & Compliance

This square nut adheres to inch system dimensions with a thread size of 5/8"-11 UNC and a Class 2B thread fit for consistent accuracy. It meets Grade 5 strength specifications, ensuring high tensile and proof load capabilities. The product is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious industrial markets.