S-96278A519 5/16"-18 Locknuts
Locknuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Finish & Compliance Parameters
Washer Parameters
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Key Features & Benefits at a Glance
- Superior vibration resistance through integrated external-tooth lock washer that bites into mating surfaces
- Exceptional corrosion resistance with 18-8 stainless steel construction for harsh industrial environments
- Reliable locking performance maintained through repeated assembly/disassembly cycles
- Precise thread engagement with Class 2B thread fit ensuring consistent torque values
- Easy installation and removal with standard external hex drive design
- Environmental compliance meeting both RoHS 3 and REACH standards for global applications
- Heavy-duty construction combining 400 stainless steel washer with 18-8 stainless steel nut body
Professional Applications & Engineering Value
This 5/16"-18 UNC locknut with external-tooth lock washer provides engineered solutions for vibration-intensive applications where fastener loosening poses significant safety and performance risks. The 18-8 stainless steel construction offers excellent corrosion resistance for outdoor equipment, marine applications, and chemical processing environments. The 400 stainless steel washer features precisely machined teeth that create positive locking action by embedding into mating surfaces, effectively resisting rotational forces caused by machinery vibration, thermal cycling, and dynamic loads. This combination makes the locknut ideal for heavy-duty industrial applications including automotive assemblies, construction equipment, conveyor systems, and manufacturing machinery where reliable, maintenance-free fastening is critical to operational safety and equipment longevity.
Specification Summary & Compliance
This locknut features 5/16"-18 UNC coarse threads with Class 2B thread fit for consistent engagement and proper torque transmission. The assembly includes an external-tooth lock washer with 0.578" outer diameter manufactured from 400 series stainless steel. The complete fastener system complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring suitability for global industrial markets and regulated applications requiring hazardous substance restrictions.
