S-90739A120 5/8"-11 Hex Nuts

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with zinc yellow-chromate plating, ensuring long-lasting performance in harsh industrial environments.
• High tensile strength from Grade 5 steel, providing reliable load-bearing capacity for heavy-duty applications.
• Left-hand thread design for specialized assemblies where reverse rotation prevents loosening under specific operational conditions.
• Coarse UNC threading with Class 2B fit, enabling quick installation and secure fastening with reduced risk of cross-threading.
• Standard external hex drive for easy tool access and straightforward tightening with common wrenches.
• Durable inch-system sizing (5/8"-11 thread, 15/16" width) ensuring compatibility with a wide range of industrial equipment.
• Consistent dimensional accuracy for reliable performance in repetitive assembly processes.

Professional Applications & Engineering Value

This 5/8"-11 UNC left-hand thread hex nut is engineered to address critical challenges in industrial settings where standard right-hand threads may loosen under counter-clockwise motion or vibration. Made from Grade 5 steel and finished with zinc yellow-chromate plating, it combats corrosion in demanding environments like machinery, automotive, and construction equipment. The coarse thread spacing and Class 2B thread fit ensure quick assembly and reduced wear, while the external hex drive allows for efficient installation with standard tools. Ideal for applications requiring reverse-thread security, this nut enhances assembly integrity and minimizes maintenance needs in high-stress operations.

Specification Summary & Compliance

This hex nut adheres to UNC thread standards with a Class 2B thread fit for consistent dimensional accuracy. It meets Grade 5 strength specifications and is manufactured from zinc yellow-chromate plated steel, complying with industry standards for performance and RoHS/REACH environmental regulations. The inch-system measurements (thread size: 5/8"-11, width: 15/16", height: 35/64") ensure precise compatibility in various industrial fastening systems.