S-90949A234 5/8"-18 Flange Nuts
Flange Nuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Flange Parameters
Material & Strength Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Secure vibration-resistant locking through distorted thread technology prevents loosening in high-stress applications
- Enhanced load distribution with 1-21/64" flange diameter reduces surface pressure and prevents material damage
- Superior corrosion resistance with black-oxide steel finish for extended service life in harsh environments
- Precision fine threading (18 UNF) ensures tighter fit and better tension control compared to coarse threads
- Reliable Grade G strength classification provides consistent mechanical performance for demanding applications
- Easy installation and removal with standard external hex drive compatible with common tools
- Full regulatory compliance with RoHS 3 and REACH standards for global industrial use
Professional Applications & Engineering Value
This Grade G black-oxide steel flange lock nut combines distorted thread locking technology with a wide bearing surface to solve critical industrial fastening challenges. The 1-21/64" flange diameter distributes clamping force over a larger area, preventing surface damage to assembled components while maintaining joint integrity. The UNF fine thread configuration with Class 2B thread fit ensures precise engagement and superior vibration resistance in machinery, automotive, and heavy equipment applications. The external hex drive facilitates efficient installation using standard wrenches, reducing assembly time while the black-oxide finish provides essential corrosion protection for extended service life in demanding environments.
Specification Summary & Compliance
This flange lock nut features 5/8"-18 UNF fine threads with Class 2B thread fit tolerance for precise engagement. The right-hand thread direction and standard hex profile ensure compatibility with industrial standards. Manufactured from Grade G steel with black-oxide surface treatment, the fastener meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance requirements, making it suitable for regulated industrial applications worldwide.
