S-90165A532 5/8"-11 x 2 5/16" Thumb Screws

Key Features & Benefits at a Glance

• Effortless manual tightening with a large four-arm thumb head (3" width, 1 1/4" height) for superior grip and torque without tools.
• Exceptional durability and corrosion resistance from black-oxide steel, offering reliable performance in demanding industrial environments.
• High mechanical strength with 180,000 psi tensile strength and Rockwell C40 hardness, ensuring the screw withstands heavy loads and resists deformation.
• Secure and adaptable fastening thanks to the removable swivel tip, which accommodates misalignment with a 10° maximum angle, protecting surfaces and improving joint integrity.
• Quick and reliable installation with a fully threaded UNC coarse thread (5/8"-11) and Class 2A fit, enabling fast engagement and consistent clamping force.
• Compliance with global environmental standards, being RoHS 3 and REACH compliant, making it suitable for regulated industries and international supply chains.
• Versatile right-hand threading for standard applications, ensuring compatibility with common nuts and threaded holes.

Professional Applications & Engineering Value

This black-oxide steel thumb screw is engineered to address common industrial challenges such as frequent adjustments, high-stress conditions, and the need for tool-free operation. Its high tensile strength (180,000 psi) and robust Rockwell C40 hardness make it ideal for heavy-duty applications in machinery, automotive assemblies, and electronic enclosures where reliability is critical. The four-arm thumb head allows for easy manual tightening in tight spaces, reducing assembly time and eliminating the risk of tool slippage. Additionally, the removable swivel tip with a 10° maximum angle compensates for minor misalignments, preventing damage to components and ensuring a secure fit. This combination of UNC coarse threading and Class 2A thread fit provides quick, precise fastening, enhancing efficiency in production and maintenance workflows.

Specification Summary & Compliance

This thumb screw features a 5/8"-11 UNC coarse thread with a Class 2A thread fit for standard dimensional accuracy and reliable engagement. It is manufactured from black-oxide steel and includes a fully threaded shank with a collar (1 1/4" diameter, 5/8" height) and a removable swivel tip (13/32" length, 11/16" diameter). The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets environmental and safety standards for industrial use.