S-90200A595 5/16"-18 x 3" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced grip and torque application with a 3/4" diameter knurled head for secure hand-tightening without tools
• Superior corrosion resistance and durability thanks to the black-oxide steel finish, extending service life in harsh environments
• High mechanical strength with 70,000 psi tensile strength and Rockwell B84 hardness for reliable performance under heavy loads
• Easy and quick installation with fully threaded UNC coarse spacing and Class 2A fit, ensuring smooth engagement and reduced assembly time
• Low-profile design with a 1/4" head height for applications where space is limited without compromising functionality
• Compliance with environmental and safety standards, including RoHS 3 and REACH, for use in regulated industries
• Versatile right-hand threading for standard directional tightening in various industrial setups

Professional Applications & Engineering Value

This 5/16"-18 thumb screw is engineered to address common challenges in industrial assembly, such as the need for rapid, tool-free adjustments and secure fastening in high-vibration environments. The black-oxide steel construction provides excellent resistance to rust and wear, making it ideal for machinery, electronics enclosures, and automotive components where durability is critical. Its low-profile knurled head offers a firm grip, reducing slippage and enhancing operator efficiency during frequent maintenance or adjustments. With a UNC coarse thread and Class 2A fit, it ensures precise alignment and reliable holding power, minimizing the risk of thread stripping in demanding applications. This screw delivers consistent performance, supporting productivity and reducing downtime in industrial thumb screw uses.

Specification Summary & Compliance

This product features a Class 2A thread fit with UNC coarse spacing for standardized compatibility and ease of use. It adheres to strict manufacturing tolerances, ensuring dimensional accuracy in the 5/16"-18 thread size. Compliance includes RoHS 3 (2015/863/EU) with exemption 6(a)-I for lead as an alloying element in steel and REACH (EC 1907/2006), confirming its suitability for environmentally conscious and regulated industrial applications.