S-90636A038 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, preventing loosening in high-stress applications
- Exceptional corrosion protection with zinc yellow-chromate plating for extended service life in harsh environments
- Heavy-duty performance with Grade 8 strength classification, ensuring reliable clamping force under extreme loads
- Precise thread engagement with Class 2B thread fit for consistent, secure fastening in industrial assemblies
- Easy installation and removal using standard external hex drive with 7/16" width for common tool compatibility
- Optimized coarse thread design with 1/4"-20 UNC threads for faster assembly and reduced cross-threading risk
- Compact profile with 7/32" height for space-constrained applications without compromising locking performance
Professional Applications & Engineering Value
This Grade 8 heavy-duty locknut with center lock distorted thread technology addresses critical vibration-induced loosening challenges in industrial machinery, automotive systems, and construction equipment. The zinc yellow-chromate plated steel construction provides dual protection against corrosion and wear, making it ideal for outdoor applications and harsh operating environments. The distorted thread locking mechanism creates consistent interference along the UNC coarse threads, ensuring maintained clamp load without requiring additional locking devices. This engineering solution reduces maintenance frequency and prevents catastrophic failures in vibration-prone applications while maintaining the high strength requirements of Grade 8 specifications for critical structural connections.
Specification Summary & Compliance
This locknut features 1/4"-20 UNC coarse threads with Class 2B thread fit for precision engagement and meets Grade 8 strength requirements. The external hex drive measures 7/16" across flats with a 7/32" height profile. Manufacturing complies with relevant industrial standards for distorted thread locknuts, and the zinc yellow-chromate plating meets corrosion resistance specifications while being RoHS and REACH compliant for environmental safety.
