S-93005A140 3/8"-16 x 2 9/16" Thumb Screws

Key Features & Benefits at a Glance

• Effortless hand-tightening with a large four-arm aluminum head for superior grip without tools
• Enhanced corrosion resistance from the black-oxide steel finish, extending service life in industrial environments
• High mechanical strength with 70,000 psi tensile strength and Rockwell C40 hardness for reliable, heavy-duty fastening
• Quick and secure coarse threading with UNC 3/8"-16 threads and Class 2A fit for rapid installation and vibration resistance
• Versatile extended tip for easier alignment and engagement in assembly applications
• Durable, lightweight head made from aluminum, reducing overall weight while maintaining structural integrity
• Compliance with environmental standards (RoHS 3), ensuring suitability for regulated industries

Professional Applications & Engineering Value

This black-oxide steel thumb screw is engineered to solve common industrial challenges such as frequent adjustments and tool-less access requirements. The four-arm aluminum head provides excellent manual torque application, reducing assembly time and eliminating the need for wrenches in confined spaces. Its UNC coarse threading and Class 2A thread fit ensure quick, secure fastening even in high-vibration environments, making it ideal for machinery panels, electronic enclosures, and prototyping fixtures. The extended tip aids in precise alignment, while the 70,000 psi tensile strength guarantees long-term reliability under dynamic loads, offering a robust fastening solution for maintenance and manufacturing teams.

Specification Summary & Compliance

This thumb screw adheres to UNC thread standards with a Class 2A thread fit for precise dimensional accuracy. It is manufactured from high-strength steel with a black-oxide finish and features a partially threaded design. The product is RoHS 3 (2015/863/EU) compliant under exemption 6(a)-I, confirming its suitability for use in regulated applications without lead restrictions.