S-93005A563 1/2"-13 x 3" Thumb Screws

Key Features & Benefits at a Glance

• Effortless manual tightening and loosening with a large four-arm thumb head (2 1/2" width and 1 1/2" height) for superior grip without tools.
• Exceptional durability and corrosion resistance provided by the black-oxide steel finish, extending service life in demanding environments.
• High mechanical strength and reliability with a tensile strength of 180,000 psi and Rockwell C40 hardness to withstand heavy loads and prevent stripping.
• Quick and secure installation due to the coarse UNC thread and Class 2A fit, ensuring consistent engagement and reducing assembly time.
• Versatile fastening capability with a fully threaded 2 3/4" length and extended tip for precise alignment and deep penetration into materials.
• Stable seating and reduced surface damage from the integrated collar (1" diameter), distributing clamp force evenly.
• Compliance with global environmental standards including RoHS 3 and REACH, making it suitable for regulated industries and export markets.

Professional Applications & Engineering Value

This black-oxide steel thumb screw is engineered to address common industrial challenges such as frequent adjustments and high-stress conditions. The four-arm head design allows for rapid manual operation in tight spaces, eliminating the need for tools and reducing downtime in assembly lines or maintenance tasks. Made from high-strength steel with a Rockwell C40 hardness and 180,000 psi tensile strength, it resists deformation and wear in heavy-duty applications like machinery, automotive fixtures, and electronic enclosures. The fully threaded UNC coarse thread and Class 2A fit ensure reliable engagement in various materials, while the extended tip aids in alignment for faster, error-free installations. Ideal for industrial thumb screw uses where durability, ease of use, and regulatory compliance are critical.

Specification Summary & Compliance

This thumb screw adheres to UNC coarse thread standards with a size of 1/2"-13 and a Class 2A thread fit for consistent dimensional accuracy. It is manufactured from steel with a black-oxide finish and includes full threading over a 2 3/4" length. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global industrial markets.