S-99891A215 1 1/2"-6 Hex Nuts

Key Features & Benefits at a Glance

• Maximum Load-Bearing Capacity: Grade 8 strength classification ensures superior performance in high-stress and heavy-duty applications, providing reliable fastening under extreme conditions.
• Enhanced Corrosion Protection: Zinc yellow-chromate plating offers excellent resistance to rust and environmental degradation, extending the nut's service life in harsh industrial settings.
• Secure Left-Hand Threading: The left-hand UNC coarse thread (1 1/2"-6) is designed for applications requiring reverse rotation security, preventing unintended loosening in rotating machinery.
• Optimized Thread Engagement: Class 2B thread fit ensures smooth assembly and consistent clamping force, reducing the risk of cross-threading and improving installation efficiency.
• Robust External Hex Drive: The standard external hex drive and 2 1/4" width allow for high-torque application with common tools, ensuring tight and secure fastening.
• Dimensional Precision: Manufactured to inch system standards with precise dimensions (1 9/32" height), guaranteeing compatibility and reliable performance in metric-context assemblies when specified.
• Versatile Industrial Use: The coarse thread and sturdy construction make it ideal for vibrating equipment and structural applications, maintaining integrity over time.

Professional Applications & Engineering Value

This Grade 8 left-hand hex nut is engineered to address critical challenges in demanding industrial environments, such as machinery vibration, high tensile loads, and corrosive conditions. Constructed from zinc yellow-chromate plated steel, it combats rust effectively, making it suitable for outdoor or humid settings like construction, automotive, and heavy equipment. The UNC coarse threading (1 1/2"-6) and left-hand thread direction provide a secure fit in applications where standard right-hand threads might loosen due to rotational forces, such as in mixers, presses, or conveyor systems. Its external hex drive and standard profile facilitate easy installation with common wrenches, reducing downtime. By ensuring reliable performance in heavy-duty scenarios, this nut helps prevent equipment failure, enhances safety, and supports long-term operational efficiency in sectors like manufacturing, mining, and transportation.

Specification Summary & Compliance

This hex nut adheres to precise dimensional standards, including a Thread Fit of Class 2B for consistent assembly and a Thread Type of UNC with coarse spacing. It meets industry specifications for inch system fasteners, ensuring compatibility with corresponding bolts. The manufacturing process follows recognized guidelines for Grade 8 strength, providing high tensile and proof load capabilities. Additionally, the zinc yellow-chromate plating complies with common corrosion resistance requirements, and the product is designed to align with general industrial standards, though specific compliance such as RoHS or REACH should be verified per batch for environmental safety.