S-91510A145 1/4"-20 x 1/2" 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 large wing-shaped head (1 5/64" width) for maximum grip without tools.
- Superior corrosion resistance thanks to the zinc-plated steel construction, extending service life in various environments.
- Quick and reliable installation with UNC coarse threading, designed for faster assembly in a wide range of materials.
- Consistent and precise thread engagement ensured by the Class 2A thread fit, reducing the risk of cross-threading.
- Versatile full-threaded design along the entire 1/2" length for secure fastening at any point.
- Compliance with major environmental regulations including RoHS 3 and REACH, making it suitable for regulated industries.
- Durable and reusable right-hand thread design for repeated applications in maintenance and assembly.
Professional Applications & Engineering Value
This zinc-plated steel thumb screw is engineered to solve common industrial challenges where tool-free access and frequent adjustments are required. The wing-shaped head provides exceptional leverage for hand-tightening, making it ideal for panels, access doors, and machinery guards that need regular maintenance. The UNC coarse thread and fully threaded design ensure rapid installation and a secure hold in wood, metal, and plastic assemblies, reducing assembly time and labor costs. Its robust construction and Class 2A thread fit prevent stripping and ensure reliable performance in industrial applications, from electronics enclosures to automotive fixtures, where vibration resistance and easy operation are critical.
Specification Summary & Compliance
This thumb screw adheres to UNC coarse thread standards with a Class 2A thread fit for consistent dimensional accuracy. Key specifications include a 1/4"-20 thread size, 1/2" length, and 0.61" head diameter. It is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global industrial use.
