S-90181A542 1/4"-20 x 1" Thumb Screws

Key Features & Benefits at a Glance

• Easy manual operation with a spade head design for superior grip and torque application without tools
• High durability and strength from steel construction with Rockwell B55 hardness, resisting wear in frequent adjustments
• Reliable load-bearing capacity with 40,000 psi tensile strength, ensuring secure fastening under stress
• Quick assembly and disassembly enabled by coarse UNC threads and right-hand threading for efficient industrial use
• Precise thread engagement with Class 2A fit, reducing cross-threading risks and improving installation consistency
• Full threading coverage along the 1-inch length for versatile grip depth in various material thicknesses
• Environmental compliance with RoHS 3 standards, making it safe for regulated industries and global supply chains

Professional Applications & Engineering Value

This 1/4"-20 thumb screw is engineered to address common industrial challenges like rapid maintenance and tool-free adjustments in machinery, enclosures, and fixtures. The steel material and Rockwell B55 hardness provide excellent resistance to deformation and corrosion, extending service life in high-use environments. Its spade head offers enhanced leverage for hand-tightening, reducing assembly time and eliminating the need for specialized tools. The UNC coarse thread and right-hand direction ensure quick, reliable engagement in metals, plastics, and wood, while the fully threaded design allows for adjustable clamping force. Ideal for applications in electronics, automotive, and manufacturing where durable, compliant fastening is critical for operational efficiency.

Specification Summary & Compliance

This thumb screw adheres to UNC coarse thread standards with a Class 2A thread fit for consistent dimensional accuracy and ease of assembly. It meets RoHS 3 (2015/863/EU) compliance, ensuring it is free from hazardous substances. The specifications include a 1/4"-20 thread size, 1-inch length, and fully threaded design, manufactured to support reliable performance in industrial settings.