S-91510A157 1/4"-20 x 1" Thumb Screws

Key Features & Benefits at a Glance

• Effortless hand-tightening with a comfortable wing head design, eliminating the need for tools and speeding up assembly.
• Superior corrosion resistance provided by the zinc-plated steel construction, ensuring long-term durability in various environments.
• Reliable and consistent engagement thanks to the Class 2A thread fit, reducing the risk of cross-threading and ensuring a secure fastening.
• Broad compatibility with UNC coarse threads (1/4"-20), making it a versatile choice for a wide range of industrial applications.
• Full-length threading for maximum grip and adjustability along the entire 1-inch length, offering flexible placement in assemblies.
• Compliance with major environmental regulations including RoHS 3 and REACH, ensuring safety and meeting international standards for hazardous substances.
• Right-hand thread direction for intuitive, standard installation that aligns with common practices, reducing operator error.

Professional Applications & Engineering Value

This zinc-plated steel thumb screw is engineered to solve common industrial challenges, such as the need for quick, tool-free adjustments in machinery, electronic enclosures, and fixtures. The wing head design provides excellent grip and torque for hand-tightening, reducing assembly time and minimizing the risk of damage from overtightening with tools. Made from robust steel with a protective zinc plating, it resists corrosion in humid or outdoor settings, extending service life. The fully threaded UNC coarse thread ensures strong holding power and easy alignment, making it ideal for applications requiring frequent disassembly, such as panel fastening, prototyping, and maintenance access points. Its compliance with RoHS and REACH makes it suitable for regulated industries, including electronics and automotive, where environmental standards are critical.

Specification Summary & Compliance

This thumb screw adheres to UNC coarse thread standards with a size of 1/4"-20 and a Class 2A thread fit, ensuring precise dimensional accuracy and interchangeability. It is fully threaded with a right-hand direction and meets manufacturing specifications for consistent performance. The product is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), confirming it is free from restricted hazardous substances, making it a reliable choice for global supply chains.