S-93005A552 1/4"-20 x 1 1/2" Thumb Screws

Key Features & Benefits at a Glance

• Effortless manual operation with a large four-arm head design for secure grip without tools
• Superior corrosion resistance from the black-oxide steel finish, extending service life in harsh environments
• Exceptional mechanical strength with 180,000 psi tensile strength and Rockwell C40 hardness for reliable, high-load applications
• Precise and secure fastening ensured by UNC coarse threads with Class 2A fit for consistent engagement
• Full-length threading provides maximum adjustability and holding power along the entire 1 3/8" thread length
• Extended tip design facilitates easier alignment and insertion into components
• Compliance with global standards including RoHS 3 and REACH for 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 corrosive elements. The four-arm head allows for quick manual tightening in machinery, enclosures, and fixtures, reducing downtime. Made from high-strength steel with a Rockwell C40 hardness and 180,000 psi tensile strength, it withstands heavy vibration and load without stripping. The fully threaded UNC coarse thread and Class 2A fit ensure reliable performance in assembly lines, electronic housings, and automotive applications, providing durability where precision and ease of use are critical.

Specification Summary & Compliance

This thumb screw features a 1/4"-20 UNC coarse thread with Class 2A thread fit for standard dimensional accuracy. It is manufactured from steel with a black-oxide finish and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are met for industrial use.