S-90079A588 5/16"-18 x 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 manual operation with a knurled head texture for superior grip and torque application without tools
- Exceptional durability and corrosion resistance thanks to the black-oxide steel material, extending service life in harsh environments
- High-strength performance with a tensile strength of 180,000 psi and Rockwell C40 hardness for reliable use in demanding applications
- Easy and secure fastening provided by the 5/16"-18 UNC coarse thread and Class 2A thread fit, ensuring precise engagement
- Versatile low-profile design with a round head and extended tip for applications requiring minimal clearance and positive seating
- Compliance with environmental standards including RoHS 3 and REACH, making it suitable for regulated industries
- Efficient partial threading allowing for quick adjustment and secure holding in a variety of materials
Professional Applications & Engineering Value
This black-oxide steel thumb screw is engineered to solve common industrial challenges such as the need for quick, tool-free adjustments and reliable fastening under vibration or stress. The knurled head ensures a firm grip, reducing slippage and enhancing operator efficiency in assembly lines, machinery maintenance, and electronic enclosures. Its coarse UNC threads and Class 2A fit provide excellent thread engagement in metals and plastics, minimizing cross-threading risks. The extended tip aids in alignment and starting threads in blind holes, while the low-profile round head fits tight spaces. Ideal for applications in manufacturing, automotive, and electronics, this screw delivers consistent performance where manual fastening and high tensile strength are critical.
Specification Summary & Compliance
This thumb screw adheres to UNC thread standards with a Class 2A thread fit for precise dimensional accuracy and easy assembly. It is manufactured from black-oxide steel with a tensile strength of 180,000 psi and hardness of Rockwell C40. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it meets strict environmental and safety regulations for hazardous substances.
