S-99607A221 8-32 x 1/4" 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
- Enhanced manual grip and torque application with a knurled round head design for secure, slip-resistant operation without tools
- Superior corrosion resistance and durability thanks to 18-8 stainless steel construction, ideal for harsh industrial environments
- High tensile strength of 80,000 PSI ensures reliable fastening under heavy loads and repeated use
- Precise and secure thread engagement with UNC coarse threading and Class 2A fit for consistent performance
- Fully threaded shank provides maximum holding power along the entire length for versatile applications
- Flared collar design offers increased bearing surface to prevent over-tightening and damage to components
- Compliance with RoHS 3 and REACH regulations guarantees environmental safety and suitability for regulated industries
Professional Applications & Engineering Value
This 8-32 UNC thumb screw is engineered to address common industrial fastening challenges, such as the need for quick, tool-free adjustments in machinery, electronic enclosures, and assembly jigs. The 18-8 stainless steel material provides excellent resistance to rust and oxidation, making it suitable for outdoor or high-moisture settings. The knurled head and flared collar enhance user control and distribute clamping force evenly, reducing the risk of stripping or component fatigue. With coarse threading and a Class 2A thread fit, it ensures fast installation and reliable retention in various materials, streamlining maintenance and reducing downtime in production environments.
Specification Summary & Compliance
This thumb screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. It is manufactured from 18-8 stainless steel, offering a hardness of Rockwell B85 and tensile strength of 80,000 PSI. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets strict environmental and safety standards for industrial use.
