S-90730A005 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 18-8 stainless steel construction, ideal for harsh environments and extended service life
- Space-saving narrow profile allows installation in tight spaces where standard nuts won't fit
- Reliable thread engagement with Class 2B thread fit ensuring consistent clamping force and vibration resistance
- Quick assembly efficiency through coarse UNC threads that reduce cross-threading risks and speed up installation
- Secure external hex drive provides excellent tool grip for precise torque application and reduced slippage
- Industry compliance assurance meeting RoHS 3 and REACH standards for safe use in regulated applications
- Precision dimensional accuracy with 3/16" width and 1/16" height maintaining consistent performance across assemblies
Professional Applications & Engineering Value
This 4-40 UNC hex nut delivers critical engineering advantages where space constraints and corrosion resistance are paramount. The narrow profile design solves clearance issues in compact assemblies while maintaining full 18-8 stainless steel strength. Its coarse thread configuration prevents binding in high-vibration environments common in industrial machinery, electronics mounting, and precision equipment. The Class 2B thread fit ensures reliable performance in automated assembly systems where consistent thread engagement is essential. With external hex drive compatibility, technicians can achieve proper torque values without specialized tools, reducing installation time and improving maintenance efficiency across manufacturing, aerospace, and marine applications where corrosion resistance is non-negotiable.
Specification Summary & Compliance
Manufactured to precise inch system dimensions (3/16" width × 1/16" height) with UNC coarse threads and Class 2B thread fit tolerance. Complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material traceability. Right-hand thread direction and external hex drive style provide standard compatibility with industry tooling and assembly processes.
