S-99291A710 1/2"-20 Locknuts
Locknuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior vibration resistance through distorted thread top lock technology that maintains clamp force in high-stress environments
- Exceptional corrosion protection with zinc-flake coating that provides long-lasting durability in harsh industrial conditions
- High-strength performance meeting ASTM Grade C specifications for reliable load-bearing capacity
- Precise thread engagement with Class 2B fine thread fit ensuring consistent, reliable fastening performance
- Easy installation and removal using standard external hex drive compatible with common wrench tools
- Environmental compliance assurance meeting both REACH and RoHS 3 standards for safe industrial use
- Optimized dimensional stability with 3/4" width and 7/16" height providing consistent performance across applications
Professional Applications & Engineering Value
This 1/2"-20 UNF locknut with distorted thread top lock technology addresses critical vibration-induced loosening challenges in industrial machinery, automotive assemblies, and heavy equipment. The zinc-flake-coated steel construction provides superior corrosion resistance compared to conventional coatings, extending service life in demanding environments. The fine thread spacing and Class 2B thread fit ensure precise engagement with mating components, while the external hex drive facilitates efficient installation in confined spaces. Engineered to ASTM Grade C standards, this industrial locknut maintains clamping force under dynamic loads, making it ideal for applications where vibration resistance and long-term reliability are paramount.
Specification Summary & Compliance
This locknut features 1/2"-20 UNF fine threads with Class 2B thread fit tolerance and right-hand thread direction. The dimensional specifications include 3/4" width across flats and 7/16" height. Manufactured to ASTM Grade C strength requirements, the nut utilizes top lock distorted thread technology for secure fastening. The product is fully compliant with REACH (EC 1907/2006) regulations and RoHS 3 (2015/863/EU) directives, ensuring environmental safety and regulatory adherence for industrial applications.
