S-91882A463 3/8"-16 x 1 1/2" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced manual grip and torque application with a 1 3/8" diameter knurled head, reducing the need for tools in frequent adjustments.
• Superior corrosion resistance and durability thanks to the black-oxide steel finish, extending service life in harsh industrial environments.
• High-strength fastening with 70,000 psi tensile strength and Rockwell B84 hardness, ensuring reliable performance under heavy loads.
• Quick and secure installation with 3/8"-16 UNC coarse threads and Class 2A thread fit, providing excellent engagement and vibration resistance.
• Full-threaded design for maximum holding power along the entire 1 1/2" length, ideal for applications requiring deep or complete thread engagement.
• Raised round head with integrated collar offers improved bearing surface and prevents over-tightening, protecting assembled components.
• Compliance with RoHS 3 and REACH regulations ensures environmental safety and meets international standards for industrial use.

Professional Applications & Engineering Value

This black-oxide steel thumb screw is engineered to address common challenges in industrial settings, such as the need for tool-free, high-strength fastening. The knurled head provides exceptional grip, even with oily hands or gloves, reducing installation time and improving operator safety. Made from robust steel with a black-oxide finish, it resists rust and wear in demanding environments like machinery, electrical enclosures, and automotive assemblies. The 3/8"-16 UNC coarse threads and Class 2A fit ensure quick alignment and secure fastening, minimizing loosening from vibrations. With a 70,000 psi tensile strength and fully threaded shank, it delivers consistent clamping force, making it ideal for applications requiring repeated adjustments without compromising integrity.

Specification Summary & Compliance

This thumb screw features a 1 1/2" length with fully threaded 3/8"-16 UNC coarse threads and Class 2A thread fit for precise dimensional accuracy. It complies with RoHS 3 (2015/863/EU) under exemption 6(a)-I and REACH (EC 1907/2006), ensuring adherence to environmental and safety standards. The manufacturing process meets industry specifications for black-oxide steel fasteners, providing reliable performance in various engineering applications.