S-91841A005 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 long-term reliability.
- Precise Class 2B thread fit ensures smooth assembly and reliable engagement with mating components.
- UNC coarse threading provides faster installation and reduced risk of cross-threading in industrial applications.
- Standard external hex drive allows for easy tightening with common wrenches, improving assembly efficiency.
- RoHS 3 and REACH compliance guarantees adherence to environmental regulations for global supply chain compatibility.
- Right-hand thread direction offers compatibility with standard fastening systems and straightforward installation.
- Durable 1/4" width and 3/32" height delivers a balanced profile for secure fastening without adding excessive weight.
Professional Applications & Engineering Value
This 4-40 UNC coarse thread hex nut is engineered to address common industrial challenges such as corrosion-induced failure and assembly inefficiency. Crafted from 18-8 stainless steel, it provides exceptional resistance to rust and oxidation, making it suitable for applications in moist or chemically aggressive environments like marine equipment, food processing machinery, and outdoor structures. The Class 2B thread fit and coarse thread spacing ensure quick, reliable fastening with minimal risk of stripping, reducing downtime in high-volume production lines. Its external hex drive design facilitates easy installation using standard tools, enhancing workflow speed while maintaining a secure hold in assemblies requiring repeated maintenance or adjustments.
Specification Summary & Compliance
This hex nut features a 4-40 UNC coarse thread with Class 2B thread fit for consistent dimensional accuracy, adhering to standard inch system measurements. It is manufactured from 18-8 stainless steel with a standard hex nut profile and right-hand thread direction. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for industrial use.
