S-99937A106 1/4"-20 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
- Effortless hand-tightening with a knurled round head for secure grip without tools in tight spaces
- Exceptional corrosion resistance due to 316 Stainless Steel construction, ideal for harsh environments
- Enhanced stability and load distribution from the integrated flange design, reducing the risk of loosening
- Reliable coarse threading (1/4"-20 UNC) ensures quick assembly and disassembly with Class 2B fit for consistent performance
- Full threading and right-hand direction provide smooth engagement and versatile application compatibility
- Compliance with RoHS 3 and REACH standards guarantees safety and environmental responsibility in industrial use
- Durable knurled texture maintains grip integrity over repeated hand-tightening cycles
Professional Applications & Engineering Value
This 316 Stainless Steel Thumb Nut is engineered to address common challenges in industrial settings, such as the need for quick, tool-free adjustments in confined areas. The flanged design increases bearing surface area, preventing damage to connected materials and ensuring secure fastening under vibration. Its coarse UNC threading and Class 2B thread fit deliver precise engagement, reducing cross-threading risks and enhancing reliability in machinery, electronics, and marine equipment. The knurled round head offers superior tactile control, making it ideal for applications requiring frequent manual maintenance. Built from corrosion-resistant 316 stainless steel, it withstands exposure to chemicals, moisture, and extreme temperatures, providing long-term durability in demanding environments like chemical processing, outdoor installations, and food handling equipment.
Specification Summary & Compliance
This thumb nut adheres to UNC thread standards with a size of 1/4"-20 and Class 2B thread fit for consistent dimensional accuracy. It features a flange with a collar diameter of 15/32" and height of 3/8", fully threaded for right-hand application. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global industrial use.
