S-91831A125 5/16"-24 Locknuts
Locknuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Temperature & Environment Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior vibration resistance through nylon insert locking technology that maintains secure fastening in high-motion environments
- Excellent corrosion resistance provided by 18-8 stainless steel construction for extended service life in harsh conditions
- Reliable performance at elevated temperatures with nylon insert rated for continuous operation up to 220°F
- Precise thread engagement ensured by Class 2B thread fit for consistent torque values and reduced cross-threading risk
- Easy installation and removal with standard external hex drive design compatible with common wrenching tools
- Regulatory compliance assurance meeting RoHS 3 and REACH standards for global industrial applications
- Fine thread optimization with UNF 5/16"-24 configuration providing enhanced clamping force distribution
Professional Applications & Engineering Value
This 5/16"-24 UNF nylon insert locknut delivers critical vibration-resistant performance for industrial machinery, automotive assemblies, and electrical equipment where loosening under dynamic loads poses significant safety risks. The 18-8 stainless steel construction ensures corrosion resistance in demanding environments while the nylon insert locking mechanism creates consistent friction against bolt threads, maintaining clamp load without damaging mating surfaces. Engineered with Class 2B thread fit, these locknuts provide precise engagement with UNF fine threads, offering superior resistance to vibrational loosening compared to coarse thread alternatives. The external hex drive facilitates efficient installation in confined spaces, making them ideal for maintenance applications across multiple industries.
Specification Summary & Compliance
This locknut features 5/16"-24 UNF fine threads with Class 2B thread fit per ASME B1.1 standards, ensuring dimensional accuracy and compatibility with corresponding male threads. The 1/2" width across flats and 11/32" height provide standard hex nut proportions for tool compatibility. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming restriction of hazardous substances for environmental and workplace safety.
