S-90636A113 5/16"-18 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 environments
- Exceptional strength and durability with Grade 8 steel construction, suitable for heavy-duty industrial applications
- Enhanced corrosion protection from black-oxide surface treatment, extending service life in demanding conditions
- Reliable thread engagement with Class 2B thread fit and UNC coarse thread profile, ensuring consistent performance
- Easy installation and removal using standard external hex drive, compatible with common wrench tools
- Environmental compliance assurance meeting both REACH and RoHS 3 standards for industrial safety
- Optimized dimensional stability with precise 1/2" width and 17/64" height for consistent assembly performance
Professional Applications & Engineering Value
This Grade 8 Black-Oxide Steel Locknut delivers critical vibration resistance where conventional fasteners fail. The innovative center lock distorted thread technology creates controlled interference along the UNC coarse thread profile, maintaining clamp force in high-vibration environments such as heavy machinery, automotive systems, and industrial equipment. The black-oxide coating provides essential corrosion protection while maintaining dimensional accuracy for repeated use. Engineered for right-hand thread applications requiring Class 2B thread fit, this external hex locknut ensures reliable performance in assembly lines and maintenance operations where vibration-induced loosening compromises safety and operational efficiency.
Specification Summary & Compliance
This locknut features 5/16"-18 UNC coarse threads with Class 2B thread fit tolerance, manufactured to precise dimensional standards (1/2" width, 17/64" height). The product complies with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental regulations, ensuring safe industrial use. The Grade 8 strength classification and center lock distorted thread design meet rigorous performance requirements for vibration-resistant fastening applications.
