S-92533A101 4-40 Thumb Nuts
Thumb Nuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Finish & Compliance Parameters
Geometric Parameters
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Key Features & Benefits at a Glance
- Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh environments and outdoor applications.
- Effortless hand-tightening and adjustment thanks to the fully knurled round head, providing a secure grip without tools.
- Reliable and precise thread engagement ensured by the Class 2B thread fit, reducing the risk of cross-threading.
- Broad compatibility with 4-40 UNC coarse threaded components, a common standard in many industrial assemblies.
- Durable and long-lasting performance from the robust one-piece design and high-grade stainless steel material.
- Safe for sensitive applications as it is compliant with RoHS 3 and REACH environmental standards.
- Convenient size with a 1/2" head diameter and 3/8" height for easy handling in tight spaces.
Professional Applications & Engineering Value
This 4-40 UNC thumb nut is engineered to solve common fastening challenges in industrial settings where tool-less operation and corrosion resistance are paramount. The 316 Stainless Steel material provides exceptional protection against chemicals, saltwater, and extreme temperatures, making it perfect for marine, chemical processing, and food industry equipment. The fully threaded design and coarse UNC thread ensure quick installation and high vibration resistance. The knurled round head offers a non-slip surface, enabling secure hand-tightening in applications requiring frequent adjustments or where tools are impractical, such as on access panels, electrical enclosures, and machinery guards.
Specification Summary & Compliance
This thumb nut features a Class 2B thread fit per the Unified National Coarse (UNC) standard, ensuring consistent and reliable threading. Key dimensions include a 1/4" collar diameter, 1/2" head diameter, and 3/8" height. The product is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, confirming it is free of hazardous substances and suitable for use in regulated industries.
