S-99904A103 3/8"-16 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
- Superior vibration resistance through precision serrations that maintain locking force under dynamic loads
- Enhanced load distribution with 3/4" flange diameter reducing surface pressure and preventing material damage
- High-strength performance meeting Grade 5 specifications for demanding industrial applications
- Corrosion protection with zinc plating that extends service life in harsh environments
- Reliable coarse threading using UNC 3/8"-16 threads for quick assembly and reduced cross-threading risk
- Secure Class 2B thread fit ensuring consistent engagement and proper clamping force
- External hex drive compatibility with standard tools for easy installation and removal
Professional Applications & Engineering Value
This Grade 5 zinc-plated steel flange lock nut addresses critical vibration-induced loosening challenges in industrial machinery, automotive assemblies, and structural frameworks. The serrated locking mechanism creates permanent resistance to rotational forces while the integrated 3/4" flange distributes clamp load across wider surface areas, preventing joint fatigue and surface damage. Engineered with UNC coarse threads and Class 2B fit, this external hex drive nut maintains precise alignment during high-speed assembly operations. The zinc-plated steel construction provides essential corrosion protection for outdoor equipment and manufacturing environments where reliability cannot be compromised.
Specification Summary & Compliance
This flange lock nut features 3/8"-16 UNC coarse threads with Class 2B thread fit for consistent engagement tolerance. The external hex drive (9/16" width) and 11/32" height profile ensure compatibility with standard wrenching tools. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental compliance for industrial distribution. The Grade 5 strength classification guarantees mechanical performance meeting industrial fastener standards for critical applications.
