S-99612A201 1 1/4"-7 Hex Nuts
Hex Nuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Enhanced corrosion resistance through zinc plating, extending service life in demanding industrial environments
- Left-hand thread design prevents unintentional loosening in rotating machinery and specialized applications
- Grade 5 strength classification provides reliable performance for medium-duty to heavy-duty fastening requirements
- Thin profile design saves space and weight while maintaining full thread engagement capability
- Coarse UNC threading enables quick assembly and disassembly while resisting vibration-induced loosening
- Class 2B thread fit ensures smooth installation with standard bolts while maintaining secure fastening
- External hex drive offers superior torque transmission for secure tightening with common tools
Professional Applications & Engineering Value
This left-hand thread hex nut addresses critical safety requirements in rotating equipment where standard right-hand threads would naturally loosen under operational forces. The Grade 5 zinc-plated steel construction provides the ideal balance of strength and corrosion protection for industrial machinery, agricultural equipment, and automotive applications. The thin profile design is particularly valuable in space-constrained assemblies while the coarse UNC thread pattern ensures reliable performance in high-vibration environments. Engineered with Class 2B thread fit, this nut delivers consistent engagement with mating components, reducing installation time and preventing cross-threading issues common in production environments.
Specification Summary & Compliance
This hex nut features 1 1/4"-7 UNC coarse threading with Class 2B thread fit per ASME B1.1 standards, ensuring dimensional accuracy and compatibility with standard fasteners. Manufactured from Grade 5 steel with zinc plating for corrosion resistance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, meeting the latest industrial safety and substance restriction requirements.
