S-90181A546 1/4"-20 x 1 1/2" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced manual operation with comfortable spade head design (1/2" height, 23/32" width) for secure grip and easy hand-tightening without tools
• Superior durability from high-strength steel construction with Rockwell B55 hardness, resisting wear in frequent adjustment applications
• Reliable load-bearing capacity with 40,000 psi tensile strength, ensuring secure fastening under mechanical stress
• Quick installation and removal through fully threaded coarse UNC design with Class 2A fit, providing smooth engagement and consistent performance
• Broad compatibility with right-hand UNC 1/4"-20 threading, making it ideal for standard industrial equipment and machinery
• Environmental compliance with RoHS 3 regulations, ensuring safe use in commercial and industrial settings without hazardous substances
• Versatile coarse thread spacing that reduces cross-threading risks and speeds up assembly in high-vibration environments

Professional Applications & Engineering Value

This 1/4"-20 thumb screw delivers exceptional engineering value by addressing common industrial challenges such as tool-free maintenance and repeated adjustments. The steel material, combined with Rockwell B55 hardness, ensures long-term reliability in demanding applications like machinery panels, electronic enclosures, and assembly jigs. The spade head offers ergonomic handling, reducing operator fatigue during frequent use, while the fully threaded UNC coarse design with Class 2A fit guarantees precise alignment and resistance to loosening. Ideal for industrial and commercial settings, this screw supports efficient operations where quick access and robust fastening are critical, all while meeting RoHS 3 compliance for environmental safety.

Specification Summary & Compliance

This thumb screw adheres to UNC thread standards with a Class 2A fit for consistent dimensional accuracy and reliable performance. Key specifications include a 1/4"-20 thread size, coarse spacing, and right-hand direction, manufactured to ensure proper threading engagement. The product is fully compliant with RoHS 3 (2015/863/EU) regulations, confirming the absence of restricted hazardous substances, and meets industrial requirements for strength and durability with a tensile strength of 40,000 psi.