S-92421A535 1/4"-20 x 3/8" 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 torque application with knurled round head and flared collar design for superior grip without tools
- Corrosion-resistant performance through high-quality brass construction for extended service life in demanding environments
- Quick installation and adjustment with 1/4"-20 UNC coarse threading enabling rapid assembly in various materials
- Reliable thread engagement achieved through Class 2A thread fit ensuring consistent fastening performance
- Secure component positioning via flared collar design that prevents over-tightening and provides stable mounting
- Full-threaded convenience allowing installation at any point along the screw's 3/8" length for versatile positioning
- Environmental compliance assurance meeting RoHS 3 and REACH standards for safe use in regulated industries
Professional Applications & Engineering Value
This brass thumb screw with 1/4"-20 UNC coarse threading addresses critical assembly challenges in industrial and electronic applications where frequent adjustments are necessary. The knurled head texture combined with the flared collar design provides exceptional manual torque capability, eliminating the need for tools in tight spaces or when quick disassembly is required. The right-hand thread direction and Class 2A thread fit ensure predictable, reliable performance in machinery, electronic enclosures, and precision instruments. The corrosion-resistant brass material maintains integrity in environments where moisture or chemical exposure would compromise standard steel fasteners, while the fully threaded construction offers maximum flexibility in mounting depth and positioning.
Specification Summary & Compliance
This thumb screw features precise 1/4"-20 UNC coarse threads with Class 2A thread fit tolerances, ensuring consistent engagement and reliable performance. The manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, making it suitable for electronics, industrial equipment, and other applications requiring regulatory compliance. Critical dimensions include 9/16" head diameter, 1/2" collar diameter, and 3/8" overall length, providing optimal proportions for manual operation and secure fastening.
