S-90079A672 1/2"-13 x 3" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced manual grip and torque application with a 1-1/4" knurled head for secure handling in tool-free operations
• Superior corrosion resistance and durability through black-oxide steel construction, extending service life in demanding environments
• High mechanical strength and load-bearing capacity with Rockwell C40 hardness and 180,000 psi tensile strength for reliable fastening under stress
• Precise and secure thread engagement using 1/2"-13 UNC coarse threads with Class 2A fit, ensuring consistent performance and easy installation
• Versatile partial threading design with 2-1/2" thread length and extended tip for flexible positioning and alignment in various assemblies
• Compliance with environmental and safety standards including RoHS 3 and REACH, making it suitable for regulated industries
• Optimized low-profile round head providing ample clearance and ergonomic operation without compromising on strength

Professional Applications & Engineering Value

This black-oxide steel thumb screw is engineered to address common industrial challenges such as frequent adjustments, vibration resistance, and manual assembly efficiency. The knurled head offers exceptional grip, reducing slippage and enabling quick hand-tightening in machinery, enclosures, and equipment panels. Its 1/2"-13 UNC coarse thread and Class 2A fit ensure rapid installation and reliable holding power, minimizing the risk of cross-threading. With a partially threaded shank and extended tip, it accommodates misalignments and provides secure fastening in wood, metal, or plastic components. Ideal for maintenance-heavy sectors like manufacturing, automotive, and electronics, this screw delivers consistent performance while meeting strict RoHS and REACH compliance for environmental safety.

Specification Summary & Compliance

The thumb screw adheres to UNC thread standards with a Class 2A thread fit for precise dimensional accuracy and interchangeability. It is manufactured from black-oxide steel with a hardness of Rockwell C40 and tensile strength of 180,000 psi, ensuring durability under high-stress conditions. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in environmentally conscious applications without hazardous substances.