S-99612A204 1 1/4"-12 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
- Left-hand thread design prevents loosening in counter-rotating applications for enhanced operational safety
- Grade 5 steel construction provides reliable tensile strength and durability in demanding industrial environments
- Zinc-plated steel material offers superior corrosion resistance for extended service life
- Thin profile design enables installation in space-constrained applications without compromising strength
- UNF fine threading with Class 2B fit ensures precise engagement and vibration resistance
- External hex drive style facilitates easy installation and removal with standard tools
- RoHS 3 and REACH compliance meets international environmental and safety standards
Professional Applications & Engineering Value
This left-hand thread hex nut delivers critical performance in applications where reverse rotation occurs, effectively preventing accidental disassembly in machinery, rotating equipment, and specialized industrial systems. The Grade 5 zinc-plated steel construction addresses two primary engineering concerns: mechanical strength for high-stress applications and corrosion resistance for harsh environments. The UNF fine threading provides superior vibration resistance compared to coarse threads, while the thin profile enables installation where standard hex nuts cannot fit. These industrial fasteners are engineered for precision equipment, automotive systems, and manufacturing machinery where reliable, long-term fastening solutions are essential for operational safety and maintenance efficiency.
Specification Summary & Compliance
This 1 1/4"-12 UNF left hand thread hex nut features Class 2B thread fit for precise engagement and maintains dimensional accuracy with a width of 1 7/8" and height of 23/32". Manufactured to inch system standards, this Grade 5 steel nut complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial applications while meeting international fastener quality requirements.
