S-99612A280 1 1/8"-7 Hex Nuts

Key Features & Benefits at a Glance

• Exceptional strength and reliability with Grade 5 steel construction, ensuring dependable performance in demanding applications.
• Superior corrosion resistance provided by the zinc plating, extending the nut's service life in harsh industrial environments.
• Space-saving thin profile design (39/64" height) for use in applications with limited clearance without compromising strength.
• Secure left-hand threading (1 1/8"-7 UNC) for specialized assemblies where reverse rotation prevents loosening under specific operational forces.
• Precise and consistent engagement guaranteed by the Class 2B thread fit, reducing the risk of cross-threading and ensuring easier assembly.
• Broad compatibility with coarse UNC threads and external hex drive, making it suitable for standard tools and common industrial fastening systems.
• Full regulatory compliance with RoHS 3 and REACH standards, ensuring safety and environmental responsibility in your supply chain.

Professional Applications & Engineering Value

This Grade 5 zinc-plated steel thin hex nut is engineered to address critical challenges in industrial and mechanical systems. Its left-hand UNC coarse thread is specifically designed for applications where standard right-hand threads may loosen due to rotational forces, such as in certain machinery, rotating shafts, or specialized equipment. The thin profile allows for installation in confined spaces where standard nuts cannot fit, while the zinc plating provides a durable barrier against corrosion, significantly reducing maintenance needs and downtime. Made from high-strength Grade 5 steel, this nut maintains integrity under high stress and vibration, making it a reliable choice for heavy-duty assemblies in construction, automotive, and manufacturing sectors. Its external hex drive ensures easy installation with common tools, streamlining the fastening process in professional settings.

Specification Summary & Compliance

This hex nut features a 1 1/8"-7 UNC left-hand coarse thread with a Class 2B thread fit for consistent dimensional accuracy and ease of assembly. The nut measures 1 11/16" in width and 39/64" in height, adhering to inch system standards. It is manufactured from Grade 5 steel and includes a zinc-plated surface treatment for enhanced durability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets strict environmental and safety requirements for industrial use.