S-90205A321 4-40 Hex Nuts
Hex Nuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior corrosion resistance with 316 stainless steel construction, ideal for harsh environments and chemical exposure
- Space-saving narrow profile design allows installation in confined areas where standard nuts won't fit
- Reliable thread engagement with Class 2B thread fit ensuring consistent performance and vibration resistance
- Quick installation with coarse UNC threads that reduce cross-threading risks and speed up assembly
- Secure external hex drive provides excellent tool grip for precise torque application
- Regulatory compliance with RoHS 3 and REACH standards for safe use in regulated industries
- Dimensional precision with 3/16" width and 1/16" height maintaining consistent fit across applications
Professional Applications & Engineering Value
Engineered for demanding industrial applications, this 4-40 UNC hex nut combines the exceptional corrosion resistance of 316 stainless steel with a space-optimized narrow profile design. The Class 2B thread fit provides reliable performance in high-vibration environments, preventing loosening while maintaining easy assembly. The coarse UNC threads offer quick installation advantages, reducing assembly time in production lines. These nuts excel in chemical processing equipment, marine applications, and food processing machinery where corrosion resistance and compact design are critical. The external hex drive ensures secure tool engagement for precise torque control during installation.
Specification Summary & Compliance
This hex nut features 4-40 UNC coarse threads with Class 2B thread fit for consistent dimensional accuracy. Manufactured to inch system standards with precise dimensions of 3/16" width and 1/16" height. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industrial suitability. Right-hand thread direction and external hex drive style provide standardized installation compatibility across industrial applications.
