S-90079A635 3/8"-16 x 3 1/2" Thumb Screws

Key Features & Benefits at a Glance

• Superior manual grip with a 1-1/4" knurled head for easy, tool-free tightening and loosening in confined spaces
• Enhanced durability and corrosion resistance thanks to the black-oxide steel finish, extending service life in industrial environments
• Reliable fastening strength with 70,000 psi tensile strength and Rockwell B84 hardness to withstand high-stress applications
• Quick and secure installation provided by the 3/8"-16 UNC coarse thread and Class 2A fit, ensuring consistent engagement
• Optimized low-profile design reduces protrusion, making it ideal for applications where space is limited
• Versatile partial threading with 2-15/16" thread length and extended tip for precise alignment and secure holding
• Compliance with environmental standards including RoHS 3 and REACH, ensuring safe use in regulated industries

Professional Applications & Engineering Value

This black-oxide steel thumb screw is engineered to address common industrial challenges such as frequent adjustments and exposure to harsh conditions. The knurled head offers a non-slip surface, enabling quick manual operation without tools, which is crucial in maintenance-heavy sectors like machinery, electronics, and automotive assembly. Its low-profile round head minimizes obstruction, while the coarse UNC threads and Class 2A fit provide rapid installation and reliable thread engagement, reducing the risk of cross-threading. With a tensile strength of 70,000 psi and corrosion-resistant coating, it delivers long-term performance in demanding applications, from equipment panels to prototyping setups, ensuring efficiency and reduced downtime.

Specification Summary & Compliance

This thumb screw adheres to precise dimensional standards, including a 3/8"-16 UNC coarse thread with Class 2A thread fit for consistent accuracy. It is manufactured from high-strength steel and features a black-oxide finish for enhanced durability. The product complies with RoHS 3 (2015/863/EU) under exemption 6(a)-I and REACH (EC 1907/2006) regulations, ensuring it meets environmental and safety requirements for industrial use.