S-90509A037 1/2"-13 Square Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance from high-quality brass construction, ensuring long-term reliability in humid or corrosive environments
• Secure fastening performance with Class 2B thread fit, providing consistent engagement and vibration resistance in industrial assemblies
• Easy manual installation and removal thanks to the external square drive design, allowing for quick adjustments with standard tools
• Enhanced durability in heavy-duty applications through coarse UNC threading, reducing cross-threading risks under high stress
• Compliance with global environmental standards including REACH and RoHS 3, making it suitable for regulated industries
• Precision dimensional accuracy with 13/16" width and 7/16" height, ensuring seamless compatibility with standard components
• Reliable right-hand threading for straightforward integration into existing inch-system machinery and equipment

Professional Applications & Engineering Value

This 1/2"-13 UNC brass square nut delivers exceptional engineering value by addressing common industrial challenges such as corrosion-induced failure and assembly inefficiency. The brass material inherently resists rust and oxidation, making it ideal for marine, plumbing, and outdoor equipment where moisture exposure is frequent. Its coarse thread design and Class 2B thread fit minimize the risk of stripping during high-torque applications, while the external square drive enables rapid installation without specialized tools—reducing labor time in maintenance or production lines. Engineers benefit from its REACH and RoHS compliance when designing for automotive, electrical, or consumer goods sectors requiring adherence to strict environmental regulations. This nut ensures reliable performance in vibrating machinery, conveyor systems, and structural frameworks, providing a robust fastening solution that maintains integrity under mechanical stress.

Specification Summary & Compliance

This square nut adheres to UNC coarse thread standards with a 1/2"-13 thread size and Class 2B thread fit for precise dimensional tolerance. Manufacturing follows inch-system specifications, including a width of 13/16" and height of 7/16", ensuring compatibility with standard components. The product is fully compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) under exemption 6(a)-I for lead as an alloying element, meeting rigorous environmental and safety requirements for industrial use.