S-90200A110 1/4"-20 x 1/2" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced grip and torque application with a 5/8" knurled head, allowing for easy hand-tightening without tools in tight spaces.
• Superior corrosion resistance and durability due to the Black-Oxide Steel finish, extending service life in harsh industrial environments.
• High tensile strength of 70,000 psi ensures reliable fastening under heavy loads, reducing the risk of failure.
• Rockwell B84 hardness provides excellent wear resistance, maintaining thread integrity over repeated use.
• Precise UNC coarse threading with Class 2A fit offers quick assembly and secure fastening, minimizing cross-threading issues.
• Fully threaded design allows for maximum adjustability and holding power across various material thicknesses.
• Compliance with RoHS 3 and REACH regulations ensures environmental safety and suitability for global industrial markets.

Professional Applications & Engineering Value

This 1/4"-20 thumb screw is engineered for applications requiring frequent adjustments and high manual torque, such as in machinery panels, electronic enclosures, and prototyping fixtures. The black-oxide steel material combats rust and wear, ideal for humid or corrosive settings. Its knurled head and UNC coarse thread enable rapid installation without tools, reducing assembly time and labor costs. With a Class 2A thread fit, it ensures consistent performance in industrial thumb screw uses, preventing loosening from vibrations and enhancing operational reliability in B2B sectors like manufacturing and automation.

Specification Summary & Compliance

This product features a 1/4"-20 UNC thread with coarse spacing and Class 2A fit for standard dimensional accuracy. It is manufactured from Black-Oxide Steel with a tensile strength of 70,000 psi and hardness of Rockwell B84. Compliant with RoHS 3 (2015/863/EU) under exemption 6(a)-I and REACH (EC 1907/2006), meeting environmental and safety standards for industrial components.