S-99291A240 3/8"-24 Locknuts
Locknuts
Image may differ from product. See technical specification for details.
Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior vibration resistance through distorted thread top lock design, preventing loosening under dynamic loads
- Enhanced corrosion protection with zinc yellow-chromate plating, extending service life in harsh environments
- High-strength performance meeting ASTM Grade C requirements for demanding industrial applications
- Precise thread engagement with Class 2B fit ensuring reliable, consistent fastening performance
- Easy installation and removal using standard external hex drive for efficient maintenance operations
- Fine thread configuration (24 TPI) providing superior clamping force and load distribution
- Right-hand threading compatibility with standard UNF fastening systems for broad application use
Professional Applications & Engineering Value
This 3/8"-24 UNF locknut with distorted thread technology addresses critical vibration-induced loosening challenges in automotive, industrial machinery, and heavy equipment assemblies. The zinc yellow-chromate-plated steel construction provides exceptional corrosion resistance while maintaining structural integrity under stress. The top lock distorted thread design creates consistent friction along the mating threads, ensuring maintained clamp load without requiring additional locking components. This external hex locknut delivers reliable performance in high-vibration environments where traditional fasteners typically fail, making it ideal for engine components, conveyor systems, and precision equipment requiring vibration-resistant fastening solutions.
Specification Summary & Compliance
This locknut features Class 2B thread fit per UNF standards with 3/8"-24 fine threading and right-hand direction. Manufacturing complies with ASTM Grade C strength requirements, ensuring consistent mechanical properties. Dimensions include 9/16" width across flats and 21/64" height profile. The zinc yellow-chromate plating provides RoHS and REACH compliant corrosion protection while maintaining dimensional accuracy for reliable assembly operations in industrial applications.
