S-90519A039 1 1/8"-7 Hex Nuts

Key Features & Benefits at a Glance

• Left-hand thread design provides secure fastening in applications requiring reverse rotation resistance
• Grade 2 steel construction delivers reliable strength and durability for industrial environments
• Coarse UNC threading enables quicker installation and reduced cross-threading risk
• Class 2B thread fit ensures consistent engagement and vibration resistance
• Standard hex profile offers compatibility with common wrenching tools
• RoHS 3 and REACH compliance meets stringent environmental regulations for global applications
• 1 11/16" width provides ample wrenching surface for secure torque application

Professional Applications & Engineering Value

This left hand thread hex nut addresses critical safety requirements in rotating machinery and equipment where standard right-hand threads could loosen under counter-clockwise motion. The Grade 2 steel construction maintains structural integrity in demanding environments, while the coarse UNC thread pattern ensures reliable performance in applications requiring frequent disassembly. The Class 2B thread fit provides optimal clearance for smooth assembly without compromising vibration resistance, making it ideal for industrial machinery, conveyor systems, and automotive applications where reverse-thread fastening is essential for operational safety and maintenance efficiency.

Specification Summary & Compliance

Manufactured to inch system standards with precise 1 1/8"-7 UNC coarse threading and Class 2B thread fit tolerances. This external hex drive nut features dimensions of 1 11/16" width × 31/32" height. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors while meeting international fastener specifications for left-hand threading applications.