S-90772A579 5/16"-18 x 1/2" Thumb Screws
Thumb Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Enhanced corrosion resistance with zinc-plated steel construction for long-lasting performance in demanding environments
- Superior surface protection with soft nylon tip to prevent marring or damage to sensitive components during fastening
- High-strength reliability offering 40,000 psi tensile strength and Rockwell B71 hardness for robust, reusable applications
- Quick and easy manual operation thanks to the spade-shaped thumb head design, eliminating the need for tools
- Wide compatibility and secure fit with Class 2A UNC coarse threads, ensuring consistent engagement in various materials
- Full-threaded design for maximum grip and holding power along the entire 1/2" length
- Compliance with strict environmental standards including RoHS 3 and REACH, making it suitable for regulated industries
Professional Applications & Engineering Value
This zinc-plated steel thumb screw is engineered to address common industrial challenges such as frequent adjustments and surface damage prevention. The soft nylon tip is crucial for applications involving delicate electronics, finished panels, or painted surfaces, where metal-on-metal contact could cause scratches or electrical shorts. The UNC coarse thread and Class 2A fit provide rapid installation and reliable performance in wood, plastic, and metal assemblies, reducing assembly time while maintaining high tensile strength. Its spade head design offers excellent torque application for secure fastening in machinery, enclosures, and equipment requiring tool-free maintenance, making it an ideal reusable fastening solution for industrial maintenance, automotive, and electronic sectors.
Specification Summary & Compliance
This thumb screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. It features a 5/16"-18 thread size with coarse spacing and is fully threaded along its 1/2" length. The product is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety requirements for industrial use.
