S-91404A546 1/4"-20 x 1 1/2" Thumb Screws

Key Features & Benefits at a Glance

• Effortless hand-tightening with a wide 1 3/8" wing head, eliminating the need for tools in quick-assembly or adjustment scenarios.
• Superior corrosion resistance provided by the zinc-plated iron finish, extending the screw's service life in various industrial environments.
• Reliable and fast engagement thanks to the coarse UNC 1/4"-20 thread and Class 2A fit, ensuring quick starts and consistent performance.
• Maximum grip and holding power along the entire 1 1/2" length due to the fully threaded design, providing secure fastening in deep or tapped holes.
• Confident material sourcing with compliance to RoHS 3 and REACH regulations, making it suitable for use in regulated markets and applications.
• Dimensional consistency with a controlled head diameter tolerance, ensuring predictable performance and fit in your assemblies.
• Versatile right-hand threading designed for standard installation, making it a familiar and easy-to-use component for maintenance and production teams.

Professional Applications & Engineering Value

This zinc-plated iron thumb screw is engineered to solve common challenges in industrial maintenance, panel fastening, and equipment adjustment. The robust wing head design offers a large surface area for a secure, non-slip grip, enabling operators to apply sufficient torque by hand without tools, which is critical in environments where speed and accessibility are paramount. The coarse UNC thread and Class 2A thread fit provide rapid installation and high resistance to cross-threading, reducing assembly time and the risk of damage to mating components. Made from zinc-plated iron, it delivers dependable corrosion resistance for use in electrical enclosures, machinery guards, and other applications exposed to moderate environmental conditions, ensuring long-term reliability and reducing maintenance frequency.

Specification Summary & Compliance

This thumb screw features a 1/4"-20 UNC coarse thread with a Class 2A thread fit for standard tolerance and easy assembly. The head diameter is 7/16" with a manufacturing tolerance of -0.0156" to 0.0156" for precision. It is fully threaded along its 1 1/2" length. The product is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to environmental and safety standards for industrial components.