S-99607A242 1/4"-28 x 1" 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
- Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments
- Exceptional grip and torque application thanks to the knurled thumb head design, enabling tool-free operation
- High mechanical strength with 80,000 psi tensile strength and Rockwell B85 hardness for reliable, long-lasting fastening
- Precise and secure thread engagement with Class 2A thread fit and fine UNF threading, reducing the risk of cross-threading
- Convenient and rapid installation due to the fully threaded design and flared collar for enhanced stability
- Wide compatibility with inch-system equipment and components, ensuring easy integration
- Environmentally responsible manufacturing compliant with RoHS 3 and REACH standards for safe use
Professional Applications & Engineering Value
This 1/4"-28 UNF Thumb Screw is engineered to address common industrial challenges such as frequent adjustments and exposure to corrosive elements. The 18-8 Stainless Steel material provides excellent resistance to rust and oxidation, making it suitable for outdoor, marine, or chemical processing applications. The knurled head offers a non-slip surface, allowing operators to apply sufficient torque without specialized tools, which speeds up assembly and maintenance tasks. Its fully threaded and fine thread design ensures maximum holding power in thin materials or where vibration resistance is critical. The flared collar distributes clamping force evenly, preventing damage to sensitive surfaces. Ideal for use in electronics enclosures, machinery panels, and instrumentation, this thumb screw delivers reliable performance where quick access and durability are paramount.
Specification Summary & Compliance
This thumb screw adheres to UNF thread standards with a Class 2A thread fit for consistent, precise engagement. Key dimensions include a 1/4"-28 thread size, 1" length, and 37/64" 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 safe for various industrial and commercial uses.
