S-90519A031 3/8"-16 Hex Nuts

Key Features & Benefits at a Glance

• Left-hand threading provides secure fastening in applications where standard right-hand threads may loosen due to rotational forces
• Grade 2 steel construction offers reliable strength and durability for general industrial applications
• Coarse UNC thread spacing enables quick assembly and reduced cross-threading risk in demanding environments
• Class 2B thread fit ensures consistent engagement and reliable performance with mating components
• Standard external hex profile allows for easy installation using common wrench tools
• RoHS 3 and REACH compliance meets international environmental standards for industrial use
• Precise dimensional specifications (9/16" width, 21/64" height) guarantee proper fit and function in inch-based assemblies

Professional Applications & Engineering Value

This left-hand thread hex nut addresses critical engineering challenges in applications where counter-rotational forces are present. The 3/8"-16 UNC coarse thread configuration provides exceptional resistance to vibration-induced loosening, making it ideal for rotating machinery, conveyor systems, and automotive components where reverse rotation occurs. Manufactured from Grade 2 steel, this fastener delivers the necessary tensile strength for general industrial applications while maintaining cost-effectiveness. The external hex drive style ensures compatibility with standard tools, streamlining maintenance and assembly processes. This combination of left-hand threading and coarse thread spacing creates a reliable fastening solution that prevents accidental disassembly in specialized mechanical systems.

Specification Summary & Compliance

This hex nut features 3/8"-16 UNC left-hand threads with Class 2B thread fit per ASME B1.1 standards, ensuring precise dimensional accuracy and reliable mating performance. The fastener meets Grade 2 strength classification requirements and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Manufacturing follows standardized inch system specifications with consistent 9/16" width and 21/64" height dimensions for uniform performance across industrial applications.