S-90636A121 1/4"-20 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 center-lock distorted thread design that maintains secure fastening under extreme conditions
- Exceptional corrosion protection with zinc-flake coating that provides long-lasting durability in harsh industrial environments
- Heavy-duty performance backed by Grade 8 strength classification for high-stress applications
- Reliable thread engagement with Class 2B thread fit ensuring consistent installation and removal
- Industry-standard compatibility through UNC coarse thread specification (1/4"-20) for broad application use
- Easy installation and removal with standard external hex drive design using common tools
- Environmental compliance meeting RoHS 3 and REACH regulations for safe industrial usage
Professional Applications & Engineering Value
This Grade 8 heavy-duty locknut addresses critical vibration-induced loosening challenges in industrial machinery, automotive assemblies, and construction equipment. The center-lock distorted thread technology creates intentional interference that resists rotational forces, maintaining clamp load integrity where standard nuts would fail. The zinc-flake coating provides superior barrier protection against corrosion, extending service life in demanding environments. With UNC coarse threading and Class 2B thread fit, this external hex locknut delivers reliable performance in high-vibration applications while ensuring compatibility with standard components. The combination of distorted thread locking mechanism and high-strength steel construction makes this fastener ideal for critical joints requiring permanent, vibration-resistant securement.
Specification Summary & Compliance
This locknut features precise Class 2B thread fit with 1/4"-20 UNC coarse threading and right-hand thread direction. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. The distorted thread center-lock design provides reliable locking performance while maintaining 7/16" width and 7/32" height dimensions for standard tool compatibility. The Grade 8 strength classification ensures consistent performance in heavy-duty industrial applications.
