S-90282A229 3/8"-16 x 2 1/2" Thumb Screws

Key Features & Benefits at a Glance

• Effortless hand-tightening with a wide 1 1/4" knurled head for superior grip and tool-free operation.
• Exceptional durability and corrosion resistance provided by the black-oxide steel finish, extending service life in demanding environments.
• High-strength performance with 80,000 psi tensile strength and Rockwell B85 hardness for reliable, heavy-duty fastening.
• Secure and adaptable clamping thanks to the permanent swivel tip, which accommodates up to 7.5° of angular misalignment to prevent component damage.
• Quick and reliable coarse threading with UNC 3/8"-16 threads and Class 2A fit for fast assembly and consistent engagement.
• Full-length threading for maximum adjustability and holding power along the entire 2 1/2" length.
• Compliance with global environmental standards including RoHS 3 and REACH, ensuring safe and responsible use in regulated industries.

Professional Applications & Engineering Value

This black-oxide steel thumb screw is engineered to solve common industrial fastening challenges where tool access is limited and repeated manual adjustments are required. The low-profile, round head with its knurled texture provides a secure, non-slip grip, reducing operator fatigue and speeding up assembly in applications like machinery panels, electronic enclosures, and jig fixtures. The integrated permanent swivel tip is a critical feature for applications involving uneven surfaces or clamped components, as it distributes pressure evenly and prevents gouging or misalignment, a common pain point in precision setups. Constructed from robust steel with a tensile strength of 80,000 psi, this thumb screw delivers the mechanical integrity needed for heavy-duty industrial use, ensuring long-term reliability without the need for frequent replacements.

Specification Summary & Compliance

This thumb screw adheres to UNC coarse thread standards with a Class 2A thread fit for consistent, reliable engagement. It is fully threaded and features a right-hand thread direction. The product is manufactured to be RoHS 3 (2015/863/EU) compliant under exemption 6(a)-I and is REACH (EC 1907/2006) compliant, meeting stringent environmental and safety regulations for industrial components.