S-99291A510 5/8"-18 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 locking technology that maintains secure fastening under dynamic loads
- Enhanced corrosion protection with black-oxide steel finish for extended service life in industrial environments
- Reliable fine-thread performance with 5/8"-18 UNF thread spacing ensuring precise engagement and reduced loosening
- Consistent quality assurance through ASTM Grade C strength classification meeting rigorous industrial standards
- Optimized installation efficiency with standard external hex drive design for straightforward tool compatibility
- Precision thread fit with Class 2B tolerance ensuring smooth assembly and consistent locking performance
- Environmental compliance meeting both RoHS 3 and REACH regulations for safe industrial usage
Professional Applications & Engineering Value
These black-oxide steel locknuts deliver critical vibration resistance in demanding applications through their innovative distorted thread locking mechanism. The top lock design creates progressive resistance during installation, eliminating the need for secondary locking components while maintaining 5/8"-18 UNF fine thread integrity. Engineered for heavy machinery, automotive assemblies, and industrial equipment where vibration-induced loosening compromises safety and performance. The external hex drive ensures compatibility with standard tools, while the ASTM Grade C material provides consistent mechanical properties across production runs. Ideal for maintenance-critical applications requiring reliable, reusable locking solutions without compromising thread engagement or assembly efficiency.
Specification Summary & Compliance
Manufactured to precise Class 2B thread fit standards with UNF thread form specifications. Dimensions include 15/16" width and 35/64" height with right-hand thread direction. Compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental regulations. Meets ASTM Grade C strength classification requirements for consistent performance in industrial fastening applications.
