S-90179A550 1/4"-20 x 2" Thumb Screws
Thumb Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Effortless manual tightening with the spade thumb head design, eliminating the need for tools in frequent adjustments.
- Superior durability and wear resistance due to the steel construction and Rockwell B55 hardness, ensuring a long service life.
- High mechanical strength with a tensile strength of 40,000 PSI, providing reliable performance under load.
- Quick and secure fastening enabled by the coarse UNC 1/4"-20 thread and Class 2A fit, reducing assembly time.
- Enhanced stability and load distribution from the integrated flange, preventing the screw from pulling through softer materials.
- Maximum grip along the entire length thanks to the fully threaded design, offering versatile clamping options.
- Safe for regulated environments as it is RoHS 3 compliant, meeting international environmental standards.
Professional Applications & Engineering Value
This 1/4-20 UNC Thumb Screw is engineered to solve common industrial challenges where tool-less operation and robust fastening are critical. The steel material, combined with a Rockwell B55 hardness and 40,000 PSI tensile strength, ensures it withstands repetitive use and high-stress conditions without stripping or failing. The spade head provides excellent leverage for manual torque application, making it ideal for applications requiring quick access and adjustments, such as in machinery panels, electronic enclosures, and assembly jigs. The coarse thread and Class 2A thread fit facilitate fast installation while maintaining a secure hold, reducing labor time and improving productivity in industrial settings. Its flanged design adds extra bearing surface, distributing pressure evenly and minimizing damage to connected components.
Specification Summary & Compliance
This thumb screw adheres to UNC 1/4"-20 coarse thread standards with a Class 2A thread fit for consistent dimensional accuracy and reliable engagement. It is manufactured from high-grade steel and is fully threaded for maximum utility. The product is compliant with RoHS 3 (2015/863/EU) regulations, ensuring it is free from hazardous substances and suitable for global industrial and electronic applications.
