S-91404A554 1/4"-20 x 3" 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 hand-tightening with a wide 1 3/8" wing head for maximum grip and quick installation without tools.
- Superior corrosion resistance thanks to the zinc-plated iron construction, ideal for harsh industrial environments.
- Reliable and secure fastening ensured by the fully threaded 3" length and coarse UNC thread design.
- Precise thread fit with Class 2A tolerance for consistent performance and easy assembly in various applications.
- Durable and long-lasting build from robust iron material, providing dependable holding strength.
- Compliance with global standards including RoHS 3 and REACH, ensuring safe and environmentally responsible use.
- Versatile right-hand threading for standard fastening operations, compatible with common UNC nuts and components.
Professional Applications & Engineering Value
This zinc-plated iron wing thumb screw is engineered to address common challenges in industrial settings, such as the need for rapid, tool-free adjustments and resistance to corrosive elements. The 1/4"-20 UNC coarse thread and Class 2A fit provide a secure, vibration-resistant connection, reducing the risk of loosening in machinery, enclosures, and assembly jigs. Its fully threaded design ensures consistent clamping force along the entire 3" length, making it ideal for applications where frequent disassembly is required, such as in maintenance panels, electrical cabinets, and prototyping equipment. By combining ease of use with durable materials, this thumb screw enhances operational efficiency and longevity in demanding environments.
Specification Summary & Compliance
This product features precise dimensions, including a head diameter of 7/16" with a tolerance of -0.0156" to 0.0156", and adheres to UNC thread standards with a Class 2A thread fit for reliable interchangeability. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets strict environmental and safety requirements for industrial use.
