S-99612A156 5/8"-11 Hex Nuts

Key Features & Benefits at a Glance

• Superior corrosion resistance through zinc-plated steel construction, extending service life in harsh industrial environments
• High-strength performance with Grade 5 classification, ensuring reliable fastening under heavy loads and vibration
• Space-saving thin profile design ideal for applications with limited clearance while maintaining full functionality
• Secure left-hand threading prevents unintended loosening in rotating machinery and specialized equipment
• Precise Class 2B thread fit guarantees smooth assembly and consistent clamping force throughout the fastener system
• Optimized coarse threading (5/8"-11 UNC) enables quick installation and reduced cross-threading risks
• Regulatory compliance assurance with RoHS 3 and REACH standards for environmentally responsible manufacturing

Professional Applications & Engineering Value

This Grade 5 zinc-plated steel hex nut delivers critical engineering solutions where reverse-rotation prevention and corrosion resistance are paramount. The left-hand UNC coarse threading specifically addresses vibration-induced loosening in rotating assemblies, while the thin hex profile accommodates space-constrained applications without compromising strength. The zinc plating provides essential protection against oxidation in manufacturing, automotive, and heavy equipment environments. Engineered with Class 2B thread fit, this fastener ensures precise engagement with mating components, reducing installation time and improving joint integrity. The combination of high-strength Grade 5 material and specialized left-hand thread direction makes it indispensable for machinery maintenance, conveyor systems, and industrial equipment requiring directional thread security.

Specification Summary & Compliance

This thin hex nut features 5/8"-11 UNC coarse threading with Class 2B thread fit per ASME B1.1 standards, ensuring dimensional accuracy and interchangeability. The zinc-plated steel construction meets Grade 5 strength requirements (equivalent to SAE J995 Grade 5) with dimensions of 15/16" width and 3/8" height. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental responsibility and workplace safety standards for industrial fastener applications.