S-90040A120 1/4"-28 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 center lock distorted thread technology that maintains secure fastening under dynamic loads
- Enhanced corrosion protection with zinc-plated steel construction for extended service life in industrial environments
- Reliable Grade 2 strength classification ensuring consistent performance for medium-duty applications
- Precise UNF fine threading (1/4"-28) with Class 2B fit for smooth engagement and secure mating with male threads
- Convenient external hex drive allowing for standard wrench access and efficient installation
- Right-hand thread direction compatible with standard assembly procedures and replacement parts
- Environmental compliance assurance meeting both RoHS 3 and REACH regulations for safe industrial use
Professional Applications & Engineering Value
This zinc-plated steel locknut delivers exceptional engineering value through its center lock distorted thread design, which creates controlled interference that prevents loosening from vibration - a critical solution for machinery, automotive, and equipment applications where secure fastening is paramount. The UNF fine thread configuration (1/4"-28) provides superior load distribution compared to coarse threads, while the external hex drive ensures compatibility with standard tools for efficient maintenance. The zinc plating offers sacrificial corrosion protection, extending service life in demanding environments. These features combine to create a vibration-resistant locking solution that maintains clamp load integrity while meeting industrial compliance requirements.
Specification Summary & Compliance
This locknut features 1/4"-28 UNF fine threads with Class 2B thread fit tolerance for reliable mating with Class 2A external threads. Manufactured to Grade 2 strength classification with standard hex profile (7/16" width) and center lock distorted thread technology. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial applications across various sectors.
